From 28459b2d925412b944fd4f9dfd8a722c7dc067dc Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Sat, 4 Mar 2023 17:38:36 +0100
Subject: [PATCH 01/23] initial commit

---
 .SRCINFO          | 13 +++++++++++++
 99-usb-sync.rules |  3 +++
 PKGBUILD          | 17 +++++++++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 .SRCINFO
 create mode 100644 99-usb-sync.rules
 create mode 100644 PKGBUILD

diff --git a/.SRCINFO b/.SRCINFO
new file mode 100644
index 0000000..6bd1922
--- /dev/null
+++ b/.SRCINFO
@@ -0,0 +1,13 @@
+pkgbase = udev-usb-sync
+	pkgdesc = Disable writecache when USB storage device is plugged
+	pkgver = 0.1
+	pkgrel = 1
+	url = https://codeberg.org/wonky/udev-usb-sync
+	arch = any
+	license = MIT
+	depends = hdparm
+	provides = udev-usb-sync
+	source = 99-usb-sync.rules
+	sha256sums = ed0253bbbd5b64529efd752978ba17176e3ff23d3f7f220bbacd3fa3a3691df9
+
+pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
new file mode 100644
index 0000000..8c4369e
--- /dev/null
+++ b/99-usb-sync.rules
@@ -0,0 +1,3 @@
+# rule to disable write cache for usb storage
+# requires hdparm to be installed
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"
diff --git a/PKGBUILD b/PKGBUILD
new file mode 100644
index 0000000..01e1ba3
--- /dev/null
+++ b/PKGBUILD
@@ -0,0 +1,17 @@
+# Maintainer: 
+pkgname='udev-usb-sync'
+pkgver=0.1
+pkgrel=1
+pkgdesc='Disable writecache when USB storage device is plugged'
+arch=('any')
+url='https://codeberg.org/wonky/udev-usb-sync'
+license=('MIT')
+depends=('hdparm')
+provides=("${pkgname}")
+source=('99-usb-sync.rules')
+sha256sums=('ed0253bbbd5b64529efd752978ba17176e3ff23d3f7f220bbacd3fa3a3691df9')
+
+package() {
+    install -d -m755 $pkgdir/etc/udev/rules.d
+    cp ${startdir}/99-usb-sync.rules "${pkgdir}/etc/udev/rules.d"
+}

From 5ce3f85b29f933228761e95bf9cf42c84ee0b79f Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Fri, 21 Jul 2023 11:03:06 +0200
Subject: [PATCH 02/23] update with rules for kernel >= 6.2

---
 99-usb-sync.rules | 10 +++++++++-
 PKGBUILD          |  8 ++++----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index 8c4369e..e8d98f6 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -1,3 +1,11 @@
-# rule to disable write cache for usb storage
+#
+# rule to disable write cache for usb storage that supports write-cache command
 # requires hdparm to be installed
 ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"
+#
+# the following rules is introduced with kernel 6.2
+# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit
+# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio
+# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%k/bdi/strict_limit",  RUN+="/usr/bin/echo 50 > /sys/block/%k/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%k/bdi/max_bytes"
+
diff --git a/PKGBUILD b/PKGBUILD
index 01e1ba3..10102c9 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,15 +1,15 @@
-# Maintainer: 
+# Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.1
-pkgrel=1
-pkgdesc='Disable writecache when USB storage device is plugged'
+pkgrel=2
+pkgdesc='Finetune writecache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
 depends=('hdparm')
 provides=("${pkgname}")
 source=('99-usb-sync.rules')
-sha256sums=('ed0253bbbd5b64529efd752978ba17176e3ff23d3f7f220bbacd3fa3a3691df9')
+sha256sums=('012b9991a9eee3149eb27e8d3c7b4d40b56bbfe2030ce84823a90c968410f8d0')
 
 package() {
     install -d -m755 $pkgdir/etc/udev/rules.d

From 1400ba10e7404b7bbf224df08c7750f6e79bef4a Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Sat, 22 Jul 2023 15:23:12 +0200
Subject: [PATCH 03/23] update .SRCINFO

---
 .SRCINFO | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index 6bd1922..05f6bdc 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,13 +1,13 @@
 pkgbase = udev-usb-sync
-	pkgdesc = Disable writecache when USB storage device is plugged
+	pkgdesc = Finetune writecache when USB storage device is plugged
 	pkgver = 0.1
-	pkgrel = 1
+	pkgrel = 2
 	url = https://codeberg.org/wonky/udev-usb-sync
 	arch = any
 	license = MIT
 	depends = hdparm
 	provides = udev-usb-sync
 	source = 99-usb-sync.rules
-	sha256sums = ed0253bbbd5b64529efd752978ba17176e3ff23d3f7f220bbacd3fa3a3691df9
+	sha256sums = 012b9991a9eee3149eb27e8d3c7b4d40b56bbfe2030ce84823a90c968410f8d0
 
 pkgname = udev-usb-sync

From 48f1a4b0810684aa70d6c7d88fe5c965a6b859fe Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 12:41:21 +0200
Subject: [PATCH 04/23] device variable is %K not %k

---
 .SRCINFO          |  8 ++++----
 99-usb-sync.rules | 12 ++++++------
 PKGBUILD          |  8 ++++----
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index 05f6bdc..42f94d1 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,13 +1,13 @@
 pkgbase = udev-usb-sync
-	pkgdesc = Finetune writecache when USB storage device is plugged
-	pkgver = 0.1
-	pkgrel = 2
+	pkgdesc = Finetune write cache when USB storage device is plugged
+	pkgver = 0.2
+	pkgrel = 1
 	url = https://codeberg.org/wonky/udev-usb-sync
 	arch = any
 	license = MIT
 	depends = hdparm
 	provides = udev-usb-sync
 	source = 99-usb-sync.rules
-	sha256sums = 012b9991a9eee3149eb27e8d3c7b4d40b56bbfe2030ce84823a90c968410f8d0
+	sha256sums = d6cb851a9be886a5f36414e872e3176983fbc5aa428af41a07f5b54bfb53d764
 
 pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index e8d98f6..b377f0b 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -1,11 +1,11 @@
-#
-# rule to disable write cache for usb storage that supports write-cache command
+# rule to disable write cache for usb storage
 # requires hdparm to be installed
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"
+#ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="[[ $(uname -r | awk -F'.' '{print $1 $2}') < 62 ]] && [[ $(which hdparm) =~ (hdparm) ]] && /usr/bin/hdparm -W 0 /dev/%K"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%K"
 #
-# the following rules is introduced with kernel 6.2
+# rules to impose buffer limits on USB devices
+# requires kernel > 6.1
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%k/bdi/strict_limit",  RUN+="/usr/bin/echo 50 > /sys/block/%k/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%k/bdi/max_bytes"
-
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%K/bdi/strict_limit",  RUN+="/usr/bin/echo 50 > /sys/block/%K/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%K/bdi/max_bytes"
diff --git a/PKGBUILD b/PKGBUILD
index 10102c9..b2b260b 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,15 +1,15 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.1
-pkgrel=2
-pkgdesc='Finetune writecache when USB storage device is plugged'
+pkgver=0.2
+pkgrel=1
+pkgdesc='Finetune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
 depends=('hdparm')
 provides=("${pkgname}")
 source=('99-usb-sync.rules')
-sha256sums=('012b9991a9eee3149eb27e8d3c7b4d40b56bbfe2030ce84823a90c968410f8d0')
+sha256sums=('d6cb851a9be886a5f36414e872e3176983fbc5aa428af41a07f5b54bfb53d764')
 
 package() {
     install -d -m755 $pkgdir/etc/udev/rules.d

From 8769c79d946527b24b07f2958ee83787f9b9fa79 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 13:21:41 +0200
Subject: [PATCH 05/23] revert %K to %k `man udev` -> $kernel, %k - The kerel
 name for this device

---
 .SRCINFO | 2 +-
 PKGBUILD | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index 42f94d1..76195e1 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Finetune write cache when USB storage device is plugged
 	pkgver = 0.2
-	pkgrel = 1
+	pkgrel = 2
 	url = https://codeberg.org/wonky/udev-usb-sync
 	arch = any
 	license = MIT
diff --git a/PKGBUILD b/PKGBUILD
index b2b260b..b2c8695 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.2
-pkgrel=1
+pkgrel=2
 pkgdesc='Finetune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'

From 8dead6406cb752c1631fcc19e0658083dbc8e22e Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 13:25:17 +0200
Subject: [PATCH 06/23] revert %K to %k `man udev` -> $kernel, %k - The kerel
 name for this device

---
 .SRCINFO          | 13 -------------
 99-usb-sync.rules |  5 ++---
 PKGBUILD          |  2 +-
 3 files changed, 3 insertions(+), 17 deletions(-)
 delete mode 100644 .SRCINFO

diff --git a/.SRCINFO b/.SRCINFO
deleted file mode 100644
index 76195e1..0000000
--- a/.SRCINFO
+++ /dev/null
@@ -1,13 +0,0 @@
-pkgbase = udev-usb-sync
-	pkgdesc = Finetune write cache when USB storage device is plugged
-	pkgver = 0.2
-	pkgrel = 2
-	url = https://codeberg.org/wonky/udev-usb-sync
-	arch = any
-	license = MIT
-	depends = hdparm
-	provides = udev-usb-sync
-	source = 99-usb-sync.rules
-	sha256sums = d6cb851a9be886a5f36414e872e3176983fbc5aa428af41a07f5b54bfb53d764
-
-pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index b377f0b..4714f86 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -1,11 +1,10 @@
 # rule to disable write cache for usb storage
 # requires hdparm to be installed
-#ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="[[ $(uname -r | awk -F'.' '{print $1 $2}') < 62 ]] && [[ $(which hdparm) =~ (hdparm) ]] && /usr/bin/hdparm -W 0 /dev/%K"
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%K"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"
 #
 # rules to impose buffer limits on USB devices
 # requires kernel > 6.1
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%K/bdi/strict_limit",  RUN+="/usr/bin/echo 50 > /sys/block/%K/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%K/bdi/max_bytes"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%k/bdi/strict_limit",  RUN+="/usr/bin/echo 50 > /sys/block/%k/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%k/bdi/max_bytes"
diff --git a/PKGBUILD b/PKGBUILD
index b2c8695..7a38c56 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -9,7 +9,7 @@ license=('MIT')
 depends=('hdparm')
 provides=("${pkgname}")
 source=('99-usb-sync.rules')
-sha256sums=('d6cb851a9be886a5f36414e872e3176983fbc5aa428af41a07f5b54bfb53d764')
+sha256sums=('cc300e97e3ea8b0bf6fa46fa93bef9cc42218676955cb3b7fa7e2706d76cf9db')
 
 package() {
     install -d -m755 $pkgdir/etc/udev/rules.d

From a7c6154c4c0d983a1bb11b3e2a7866a63f572906 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 13:25:56 +0200
Subject: [PATCH 07/23] revert %K to %k `man udev` -> $kernel, %k - The kerel
 name for this device

---
 .SRCINFO | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 .SRCINFO

diff --git a/.SRCINFO b/.SRCINFO
new file mode 100644
index 0000000..2d52336
--- /dev/null
+++ b/.SRCINFO
@@ -0,0 +1,13 @@
+pkgbase = udev-usb-sync
+	pkgdesc = Finetune write cache when USB storage device is plugged
+	pkgver = 0.2
+	pkgrel = 2
+	url = https://codeberg.org/wonky/udev-usb-sync
+	arch = any
+	license = MIT
+	depends = hdparm
+	provides = udev-usb-sync
+	source = 99-usb-sync.rules
+	sha256sums = cc300e97e3ea8b0bf6fa46fa93bef9cc42218676955cb3b7fa7e2706d76cf9db
+
+pkgname = udev-usb-sync

From 857d338d0312d4bae0e60646bfc8000b60679ce3 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 15:30:17 +0200
Subject: [PATCH 08/23] added user config - trigger script from udev rule

---
 .SRCINFO           | 12 ++++++++----
 99-usb-sync.rules  |  4 +++-
 PKGBUILD           | 18 ++++++++++++------
 udev-usb-sync.conf |  5 +++++
 udev-usb-sync.sh   | 26 ++++++++++++++++++++++++++
 5 files changed, 54 insertions(+), 11 deletions(-)
 create mode 100644 udev-usb-sync.conf
 create mode 100755 udev-usb-sync.sh

diff --git a/.SRCINFO b/.SRCINFO
index 2d52336..2d4ad79 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,13 +1,17 @@
 pkgbase = udev-usb-sync
-	pkgdesc = Finetune write cache when USB storage device is plugged
-	pkgver = 0.2
-	pkgrel = 2
+	pkgdesc = Fine tune write cache when USB storage device is plugged
+	pkgver = 0.3
+	pkgrel = 1
 	url = https://codeberg.org/wonky/udev-usb-sync
 	arch = any
 	license = MIT
 	depends = hdparm
 	provides = udev-usb-sync
 	source = 99-usb-sync.rules
-	sha256sums = cc300e97e3ea8b0bf6fa46fa93bef9cc42218676955cb3b7fa7e2706d76cf9db
+	source = udev-usb-sync.sh
+	source = udev-usb-sync.conf
+	sha256sums = 6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035
+	sha256sums = 4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324
+	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
 
 pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index 4714f86..c47f9d1 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -7,4 +7,6 @@ ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bi
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%k/bdi/strict_limit",  RUN+="/usr/bin/echo 50 > /sys/block/%k/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%k/bdi/max_bytes"
+# implemented using  /usr/bin/udev-usb-tweak.sh 
+# optional configuration in /etc/udev-usb-tweak/udev-usb-tweak.sh
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+=/usr/bin/udev-usb-tweak.sh %k"
diff --git a/PKGBUILD b/PKGBUILD
index 7a38c56..e423680 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,17 +1,23 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.2
-pkgrel=2
-pkgdesc='Finetune write cache when USB storage device is plugged'
+pkgver=0.3
+pkgrel=1
+pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
 depends=('hdparm')
 provides=("${pkgname}")
-source=('99-usb-sync.rules')
-sha256sums=('cc300e97e3ea8b0bf6fa46fa93bef9cc42218676955cb3b7fa7e2706d76cf9db')
+source=('99-usb-sync.rules' 'udev-usb-sync.sh' 'udev-usb-sync.conf')
+sha256sums=('6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035'
+            '4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324'
+            'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
 
 package() {
     install -d -m755 $pkgdir/etc/udev/rules.d
-    cp ${startdir}/99-usb-sync.rules "${pkgdir}/etc/udev/rules.d"
+    install -d -m755 $pkgdir/etc/$pkgname
+    install -d -m755 $pkgdir/usr/bin
+    cp ${srcdir}/99-usb-sync.rules "${pkgdir}/etc/udev/rules.d"
+    cp ${srcdir}/${pkgname}.sh "${pkgdir}/usr/bin"
+    cp ${srcdir}/${pkgname}.conf "${pkgdir}/etc/${pkgname}"
 }
diff --git a/udev-usb-sync.conf b/udev-usb-sync.conf
new file mode 100644
index 0000000..31683ee
--- /dev/null
+++ b/udev-usb-sync.conf
@@ -0,0 +1,5 @@
+# default values 
+#use_tweaks=1
+#max_bytes=16777216
+#max_ratio=50
+#strict_limit=1
diff --git a/udev-usb-sync.sh b/udev-usb-sync.sh
new file mode 100755
index 0000000..54c51f7
--- /dev/null
+++ b/udev-usb-sync.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/bash
+#
+# script to tweak USB storage device filesystem sync
+#
+# soures /etc/tweak-usb/tweaks.conf
+#
+
+use_tweaks=1
+max_bytes=16777216
+max_ration=50
+strict_limit=1
+
+# read user config
+source /etc/tweak-usb/tweaks.conf
+
+if [[ "$use_tweaks" = 0 ]]; then
+	exit 0
+fi
+
+if [[ -z "$1" ]]; then
+	exit 1
+fi
+
+echo "$max_bytes" > "/dev/block/$1/bdi/max_bytes"
+echo "$max_ration" > "/dev/block/$1/bdi/max_ratio"
+echo "$strict_limit" > "/dev/block/$1/bdi/strict_limit"

From 2ef9cbb9f081ff287d3d4343b800a8a1e02abb8f Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 15:38:29 +0200
Subject: [PATCH 09/23] added .install

---
 .SRCINFO | 17 -----------------
 PKGBUILD |  3 ++-
 2 files changed, 2 insertions(+), 18 deletions(-)
 delete mode 100644 .SRCINFO

diff --git a/.SRCINFO b/.SRCINFO
deleted file mode 100644
index 2d4ad79..0000000
--- a/.SRCINFO
+++ /dev/null
@@ -1,17 +0,0 @@
-pkgbase = udev-usb-sync
-	pkgdesc = Fine tune write cache when USB storage device is plugged
-	pkgver = 0.3
-	pkgrel = 1
-	url = https://codeberg.org/wonky/udev-usb-sync
-	arch = any
-	license = MIT
-	depends = hdparm
-	provides = udev-usb-sync
-	source = 99-usb-sync.rules
-	source = udev-usb-sync.sh
-	source = udev-usb-sync.conf
-	sha256sums = 6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035
-	sha256sums = 4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324
-	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
-
-pkgname = udev-usb-sync
diff --git a/PKGBUILD b/PKGBUILD
index e423680..2e1ad43 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,13 +1,14 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.3
-pkgrel=1
+pkgrel=2
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
 depends=('hdparm')
 provides=("${pkgname}")
+install=${pkgname}.install
 source=('99-usb-sync.rules' 'udev-usb-sync.sh' 'udev-usb-sync.conf')
 sha256sums=('6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035'
             '4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324'

From 46743f8a21bb0a897cb6c6fd1be26d3cd6b44e09 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 15:39:37 +0200
Subject: [PATCH 10/23] updated install

---
 .SCRINFO              | 18 ++++++++++++++++++
 udev-usb-sync.install | 11 +++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 .SCRINFO
 create mode 100644 udev-usb-sync.install

diff --git a/.SCRINFO b/.SCRINFO
new file mode 100644
index 0000000..ed3fb56
--- /dev/null
+++ b/.SCRINFO
@@ -0,0 +1,18 @@
+pkgbase = udev-usb-sync
+	pkgdesc = Fine tune write cache when USB storage device is plugged
+	pkgver = 0.3
+	pkgrel = 1
+	url = https://codeberg.org/wonky/udev-usb-sync
+	install = udev-usb-sync.install
+	arch = any
+	license = MIT
+	depends = hdparm
+	provides = udev-usb-sync
+	source = 99-usb-sync.rules
+	source = udev-usb-sync.sh
+	source = udev-usb-sync.conf
+	sha256sums = 6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035
+	sha256sums = 4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324
+	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
+
+pkgname = udev-usb-sync
diff --git a/udev-usb-sync.install b/udev-usb-sync.install
new file mode 100644
index 0000000..7b7452a
--- /dev/null
+++ b/udev-usb-sync.install
@@ -0,0 +1,11 @@
+post_install() {
+	udevadm control --reload
+}
+
+post_upgrade() {
+	post_install
+}
+
+post_remove() {
+	post_install
+}

From 05dac8106877415ecf7c40bf4e819fd6552119e3 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 15:41:10 +0200
Subject: [PATCH 11/23] fix .SRCINFO

---
 .SCRINFO => .SRCINFO | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename .SCRINFO => .SRCINFO (100%)

diff --git a/.SCRINFO b/.SRCINFO
similarity index 100%
rename from .SCRINFO
rename to .SRCINFO

From 36a36bc2fb2f6d1db3e12d5bb2fe3bb4a4341075 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 16:03:22 +0200
Subject: [PATCH 12/23] update install to backup config

---
 .SRCINFO | 3 ++-
 PKGBUILD | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index ed3fb56..cfb69cb 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,13 +1,14 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Fine tune write cache when USB storage device is plugged
 	pkgver = 0.3
-	pkgrel = 1
+	pkgrel = 3
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install
 	arch = any
 	license = MIT
 	depends = hdparm
 	provides = udev-usb-sync
+	backup = etc/udev-usb-sync/udev-usb-sync.conf
 	source = 99-usb-sync.rules
 	source = udev-usb-sync.sh
 	source = udev-usb-sync.conf
diff --git a/PKGBUILD b/PKGBUILD
index 2e1ad43..4abcb46 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,13 +1,14 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.3
-pkgrel=2
+pkgrel=3
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
 depends=('hdparm')
 provides=("${pkgname}")
+backup=("etc/${pkgname}/${pkgname}.conf")
 install=${pkgname}.install
 source=('99-usb-sync.rules' 'udev-usb-sync.sh' 'udev-usb-sync.conf')
 sha256sums=('6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035'

From 8e3f2a561e1002a41adaf3bb5bf660ea4d826dd7 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 16:07:29 +0200
Subject: [PATCH 13/23] fix error in rules file

---
 .SRCINFO          | 4 ++--
 99-usb-sync.rules | 2 +-
 PKGBUILD          | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index cfb69cb..877111f 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Fine tune write cache when USB storage device is plugged
 	pkgver = 0.3
-	pkgrel = 3
+	pkgrel = 4
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install
 	arch = any
@@ -12,7 +12,7 @@ pkgbase = udev-usb-sync
 	source = 99-usb-sync.rules
 	source = udev-usb-sync.sh
 	source = udev-usb-sync.conf
-	sha256sums = 6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035
+	sha256sums = 39e714df856c8d47fe14365b854b9a1b36ed3afa300383d8329452394a01a1c4
 	sha256sums = 4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324
 	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
 
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index c47f9d1..b1d8fb4 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -9,4 +9,4 @@ ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bi
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
 # implemented using  /usr/bin/udev-usb-tweak.sh 
 # optional configuration in /etc/udev-usb-tweak/udev-usb-tweak.sh
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+=/usr/bin/udev-usb-tweak.sh %k"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+=/usr/bin/udev-usb-sync.sh %k"
diff --git a/PKGBUILD b/PKGBUILD
index 4abcb46..7484e0d 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.3
-pkgrel=3
+pkgrel=4
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
@@ -11,7 +11,7 @@ provides=("${pkgname}")
 backup=("etc/${pkgname}/${pkgname}.conf")
 install=${pkgname}.install
 source=('99-usb-sync.rules' 'udev-usb-sync.sh' 'udev-usb-sync.conf')
-sha256sums=('6b4d422f1b8579ac172c82099a80201167a635c2b699639e59420ab87867a035'
+sha256sums=('39e714df856c8d47fe14365b854b9a1b36ed3afa300383d8329452394a01a1c4'
             '4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324'
             'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
 

From 518ee1000c2efd9146856d5b24c18b404e1e3b76 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 16:12:47 +0200
Subject: [PATCH 14/23] update install

---
 99-usb-sync.rules | 2 +-
 PKGBUILD          | 4 ++--
 udev-usb-sync.sh  | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index b1d8fb4..af4416a 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -9,4 +9,4 @@ ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bi
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
 # implemented using  /usr/bin/udev-usb-tweak.sh 
 # optional configuration in /etc/udev-usb-tweak/udev-usb-tweak.sh
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+=/usr/bin/udev-usb-sync.sh %k"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+=/usr/bin/udev-usb-sync.sh %k"	
diff --git a/PKGBUILD b/PKGBUILD
index 7484e0d..b0d6aac 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.3
-pkgrel=4
+pkgrel=5
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
@@ -20,6 +20,6 @@ package() {
     install -d -m755 $pkgdir/etc/$pkgname
     install -d -m755 $pkgdir/usr/bin
     cp ${srcdir}/99-usb-sync.rules "${pkgdir}/etc/udev/rules.d"
-    cp ${srcdir}/${pkgname}.sh "${pkgdir}/usr/bin"
+    cpwh ${srcdir}/${pkgname}.sh "${pkgdir}/usr/bin"
     cp ${srcdir}/${pkgname}.conf "${pkgdir}/etc/${pkgname}"
 }
diff --git a/udev-usb-sync.sh b/udev-usb-sync.sh
index 54c51f7..1a133aa 100755
--- a/udev-usb-sync.sh
+++ b/udev-usb-sync.sh
@@ -11,7 +11,7 @@ max_ration=50
 strict_limit=1
 
 # read user config
-source /etc/tweak-usb/tweaks.conf
+source /etc/usb-dev-sync/usb-dev-sync.conf
 
 if [[ "$use_tweaks" = 0 ]]; then
 	exit 0

From 483a454df9532eb6eea47b38b8fde6922c3256e8 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 16:39:59 +0200
Subject: [PATCH 15/23] update install

---
 .SRCINFO                          | 19 -------------------
 99-usb-sync.rules                 |  2 +-
 PKGBUILD                          | 10 +++++-----
 udev-usb-sync.sh => udev-usb-sync |  4 ++--
 4 files changed, 8 insertions(+), 27 deletions(-)
 delete mode 100644 .SRCINFO
 rename udev-usb-sync.sh => udev-usb-sync (81%)

diff --git a/.SRCINFO b/.SRCINFO
deleted file mode 100644
index 877111f..0000000
--- a/.SRCINFO
+++ /dev/null
@@ -1,19 +0,0 @@
-pkgbase = udev-usb-sync
-	pkgdesc = Fine tune write cache when USB storage device is plugged
-	pkgver = 0.3
-	pkgrel = 4
-	url = https://codeberg.org/wonky/udev-usb-sync
-	install = udev-usb-sync.install
-	arch = any
-	license = MIT
-	depends = hdparm
-	provides = udev-usb-sync
-	backup = etc/udev-usb-sync/udev-usb-sync.conf
-	source = 99-usb-sync.rules
-	source = udev-usb-sync.sh
-	source = udev-usb-sync.conf
-	sha256sums = 39e714df856c8d47fe14365b854b9a1b36ed3afa300383d8329452394a01a1c4
-	sha256sums = 4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324
-	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
-
-pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index af4416a..68c3a3d 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -9,4 +9,4 @@ ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bi
 # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
 # implemented using  /usr/bin/udev-usb-tweak.sh 
 # optional configuration in /etc/udev-usb-tweak/udev-usb-tweak.sh
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+=/usr/bin/udev-usb-sync.sh %k"	
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/udev-usb-sync %k"
diff --git a/PKGBUILD b/PKGBUILD
index b0d6aac..50495cc 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.3
-pkgrel=5
+pkgrel=6
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
@@ -10,9 +10,9 @@ depends=('hdparm')
 provides=("${pkgname}")
 backup=("etc/${pkgname}/${pkgname}.conf")
 install=${pkgname}.install
-source=('99-usb-sync.rules' 'udev-usb-sync.sh' 'udev-usb-sync.conf')
-sha256sums=('39e714df856c8d47fe14365b854b9a1b36ed3afa300383d8329452394a01a1c4'
-            '4d3588b241d5214faeeac021668627e115e69f62b28454f351daa532082f6324'
+source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
+sha256sums=('be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3'
+            '2669e043722b33009798c8c30f48414e1eaad0f001631587f502b19a2f11feb7'
             'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
 
 package() {
@@ -20,6 +20,6 @@ package() {
     install -d -m755 $pkgdir/etc/$pkgname
     install -d -m755 $pkgdir/usr/bin
     cp ${srcdir}/99-usb-sync.rules "${pkgdir}/etc/udev/rules.d"
-    cpwh ${srcdir}/${pkgname}.sh "${pkgdir}/usr/bin"
+    cp ${srcdir}/${pkgname} "${pkgdir}/usr/bin"
     cp ${srcdir}/${pkgname}.conf "${pkgdir}/etc/${pkgname}"
 }
diff --git a/udev-usb-sync.sh b/udev-usb-sync
similarity index 81%
rename from udev-usb-sync.sh
rename to udev-usb-sync
index 1a133aa..392a1a1 100755
--- a/udev-usb-sync.sh
+++ b/udev-usb-sync
@@ -2,7 +2,7 @@
 #
 # script to tweak USB storage device filesystem sync
 #
-# soures /etc/tweak-usb/tweaks.conf
+# sources /etc/usb-dev-sync/usb-dev-sync.conf
 #
 
 use_tweaks=1
@@ -11,7 +11,7 @@ max_ration=50
 strict_limit=1
 
 # read user config
-source /etc/usb-dev-sync/usb-dev-sync.conf
+source /etc/udev-usb-sync/udev-usb-sync.conf
 
 if [[ "$use_tweaks" = 0 ]]; then
 	exit 0

From 353772ed77b535e892a7d001b1f9eeabb9cf5042 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 16:41:27 +0200
Subject: [PATCH 16/23] update package

---
 .SRCINFO | 19 +++++++++++++++++++
 PKGBUILD |  4 ++--
 2 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 .SRCINFO

diff --git a/.SRCINFO b/.SRCINFO
new file mode 100644
index 0000000..a97abda
--- /dev/null
+++ b/.SRCINFO
@@ -0,0 +1,19 @@
+pkgbase = udev-usb-sync
+	pkgdesc = Fine tune write cache when USB storage device is plugged
+	pkgver = 0.4
+	pkgrel = 1
+	url = https://codeberg.org/wonky/udev-usb-sync
+	install = udev-usb-sync.install
+	arch = any
+	license = MIT
+	depends = hdparm
+	provides = udev-usb-sync
+	backup = etc/udev-usb-sync/udev-usb-sync.conf
+	source = 99-usb-sync.rules
+	source = udev-usb-sync
+	source = udev-usb-sync.conf
+	sha256sums = be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3
+	sha256sums = 2669e043722b33009798c8c30f48414e1eaad0f001631587f502b19a2f11feb7
+	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
+
+pkgname = udev-usb-sync
diff --git a/PKGBUILD b/PKGBUILD
index 50495cc..d9ce1e3 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.3
-pkgrel=6
+pkgver=0.4
+pkgrel=1
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'

From 664c6ab1d880bf6dbf17d4189d83c0d611e2a24c Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 16:50:41 +0200
Subject: [PATCH 17/23] update script

---
 .SRCINFO      | 4 ++--
 PKGBUILD      | 4 ++--
 udev-usb-sync | 6 +++---
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index a97abda..9e601b8 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,6 +1,6 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Fine tune write cache when USB storage device is plugged
-	pkgver = 0.4
+	pkgver = 0.5
 	pkgrel = 1
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install
@@ -13,7 +13,7 @@ pkgbase = udev-usb-sync
 	source = udev-usb-sync
 	source = udev-usb-sync.conf
 	sha256sums = be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3
-	sha256sums = 2669e043722b33009798c8c30f48414e1eaad0f001631587f502b19a2f11feb7
+	sha256sums = 0c60b841dd18521130eb22e18bf62bb5bf3dcf124e64dd7a6764aaf5af972eea
 	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
 
 pkgname = udev-usb-sync
diff --git a/PKGBUILD b/PKGBUILD
index d9ce1e3..2ff593e 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,6 +1,6 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.4
+pkgver=0.5
 pkgrel=1
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
@@ -12,7 +12,7 @@ backup=("etc/${pkgname}/${pkgname}.conf")
 install=${pkgname}.install
 source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
 sha256sums=('be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3'
-            '2669e043722b33009798c8c30f48414e1eaad0f001631587f502b19a2f11feb7'
+            '0c60b841dd18521130eb22e18bf62bb5bf3dcf124e64dd7a6764aaf5af972eea'
             'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
 
 package() {
diff --git a/udev-usb-sync b/udev-usb-sync
index 392a1a1..73895e3 100755
--- a/udev-usb-sync
+++ b/udev-usb-sync
@@ -21,6 +21,6 @@ if [[ -z "$1" ]]; then
 	exit 1
 fi
 
-echo "$max_bytes" > "/dev/block/$1/bdi/max_bytes"
-echo "$max_ration" > "/dev/block/$1/bdi/max_ratio"
-echo "$strict_limit" > "/dev/block/$1/bdi/strict_limit"
+echo "$max_bytes" > "/sys/block/$1/bdi/max_bytes"
+echo "$max_ration" > "/sys/block/$1/bdi/max_ratio"
+echo "$strict_limit" > "/sys/block/$1/bdi/strict_limit"

From 33710ef7f9823161e568423268a87f35605834fb Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Tue, 29 Aug 2023 17:51:27 +0200
Subject: [PATCH 18/23] fix spelling error in script

---
 .SRCINFO      | 2 +-
 PKGBUILD      | 4 ++--
 udev-usb-sync | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index 9e601b8..263a401 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -13,7 +13,7 @@ pkgbase = udev-usb-sync
 	source = udev-usb-sync
 	source = udev-usb-sync.conf
 	sha256sums = be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3
-	sha256sums = 0c60b841dd18521130eb22e18bf62bb5bf3dcf124e64dd7a6764aaf5af972eea
+	sha256sums = 8d16ac2e912fa12c2ea79a8de4b94588b8f9e658fd8a3bf1e65bc8e5318c3140
 	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
 
 pkgname = udev-usb-sync
diff --git a/PKGBUILD b/PKGBUILD
index 2ff593e..0b87561 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,6 +1,6 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.5
+pkgver=0.6
 pkgrel=1
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
@@ -12,7 +12,7 @@ backup=("etc/${pkgname}/${pkgname}.conf")
 install=${pkgname}.install
 source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
 sha256sums=('be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3'
-            '0c60b841dd18521130eb22e18bf62bb5bf3dcf124e64dd7a6764aaf5af972eea'
+            '8d16ac2e912fa12c2ea79a8de4b94588b8f9e658fd8a3bf1e65bc8e5318c3140'
             'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
 
 package() {
diff --git a/udev-usb-sync b/udev-usb-sync
index 73895e3..ccaab7e 100755
--- a/udev-usb-sync
+++ b/udev-usb-sync
@@ -7,7 +7,7 @@
 
 use_tweaks=1
 max_bytes=16777216
-max_ration=50
+max_ratio=50
 strict_limit=1
 
 # read user config
@@ -22,5 +22,5 @@ if [[ -z "$1" ]]; then
 fi
 
 echo "$max_bytes" > "/sys/block/$1/bdi/max_bytes"
-echo "$max_ration" > "/sys/block/$1/bdi/max_ratio"
+echo "$max_ratio" > "/sys/block/$1/bdi/max_ratio"
 echo "$strict_limit" > "/sys/block/$1/bdi/strict_limit"

From d000ce16b63001198932d172ed45ee2b321ef322 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Wed, 30 Aug 2023 08:59:48 +0200
Subject: [PATCH 19/23] rebuild .SRCINFO

---
 .SRCINFO | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.SRCINFO b/.SRCINFO
index 263a401..3092842 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,6 +1,6 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Fine tune write cache when USB storage device is plugged
-	pkgver = 0.5
+	pkgver = 0.6
 	pkgrel = 1
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install

From 235b7bf4ffb656e2ced545299d2fa89a4fc96c15 Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <noreply@wonky.codeberg.org>
Date: Mon, 16 Oct 2023 06:32:58 +0200
Subject: [PATCH 20/23] update PKGBUILD (removed provides as per guidelines)

---
 .SRCINFO |  3 +--
 PKGBUILD | 17 ++++++++---------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index 3092842..d0c9955 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,13 +1,12 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Fine tune write cache when USB storage device is plugged
 	pkgver = 0.6
-	pkgrel = 1
+	pkgrel = 2
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install
 	arch = any
 	license = MIT
 	depends = hdparm
-	provides = udev-usb-sync
 	backup = etc/udev-usb-sync/udev-usb-sync.conf
 	source = 99-usb-sync.rules
 	source = udev-usb-sync
diff --git a/PKGBUILD b/PKGBUILD
index 0b87561..8b3edbf 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,25 +1,24 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.6
-pkgrel=1
+pkgrel=2
 pkgdesc='Fine tune write cache when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
 depends=('hdparm')
-provides=("${pkgname}")
 backup=("etc/${pkgname}/${pkgname}.conf")
-install=${pkgname}.install
+install="${pkgname}.install"
 source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
 sha256sums=('be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3'
             '8d16ac2e912fa12c2ea79a8de4b94588b8f9e658fd8a3bf1e65bc8e5318c3140'
             'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
 
 package() {
-    install -d -m755 $pkgdir/etc/udev/rules.d
-    install -d -m755 $pkgdir/etc/$pkgname
-    install -d -m755 $pkgdir/usr/bin
-    cp ${srcdir}/99-usb-sync.rules "${pkgdir}/etc/udev/rules.d"
-    cp ${srcdir}/${pkgname} "${pkgdir}/usr/bin"
-    cp ${srcdir}/${pkgname}.conf "${pkgdir}/etc/${pkgname}"
+    install -d -m755 "$pkgdir/etc/udev/rules.d"
+    install -d -m755 "$pkgdir/etc/$pkgname"
+    install -d -m755 "$pkgdir/usr/bin"
+    cp "${srcdir}/99-usb-sync.rules" "${pkgdir}/etc/udev/rules.d"
+    cp "${srcdir}/${pkgname}" "${pkgdir}/usr/bin"
+    cp "${srcdir}/${pkgname}.conf" "${pkgdir}/etc/${pkgname}"
 }

From b9129ec0ed58443ce501443bdf11c012601bc4bc Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <fhdk.6pmrw@8shield.net>
Date: Tue, 27 Aug 2024 11:15:49 +0200
Subject: [PATCH 21/23] Update rules and scripts to v.0.8

---
 .SRCINFO           | 12 +++++-----
 99-usb-sync.rules  | 49 +++++++++++++++++++++++++++++++-------
 PKGBUILD           | 14 +++++------
 udev-usb-sync      | 59 +++++++++++++++++++++++++++++++++++++++++-----
 udev-usb-sync.conf | 52 ++++++++++++++++++++++++++++++++++++++--
 5 files changed, 157 insertions(+), 29 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index d0c9955..e1d8868 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = udev-usb-sync
-	pkgdesc = Fine tune write cache when USB storage device is plugged
-	pkgver = 0.6
-	pkgrel = 2
+	pkgdesc = Fine tune write cache and impose buffer limites when USB storage device is plugged
+	pkgver = 0.8
+	pkgrel = 1
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install
 	arch = any
@@ -11,8 +11,8 @@ pkgbase = udev-usb-sync
 	source = 99-usb-sync.rules
 	source = udev-usb-sync
 	source = udev-usb-sync.conf
-	sha256sums = be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3
-	sha256sums = 8d16ac2e912fa12c2ea79a8de4b94588b8f9e658fd8a3bf1e65bc8e5318c3140
-	sha256sums = bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453
+	sha256sums = 4f5888647d9be47a8992a7f5ea52eadd5baac0295a39751baa496815bddb065f
+	sha256sums = b514e3bf1ea55f5e1dc4f5af46da3b5f9f2409da1efe7b36a11647704faf0a8f
+	sha256sums = 7cf194b2e3767f8ce4dcbf98b665e46d67624034d5ec0f4cb89f359b677c3687
 
 pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index 68c3a3d..06ad118 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -1,12 +1,45 @@
+# This rules file is part of udev-usb-sync package
+#
+# MIT License
+#
+# Copyright (c) 2023 Frede Hundewadt (@linux-aarhus)
+#
+# Permission is hereby granted, free of charge,to any person obtaining a copy
+# of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+#    @linux-aarhus - root.nix.dk
+#
+# configuration : /etc/usb-dev-sync/usb-dev-sync.conf
+# triggered by  : /usr/lib/udev/rules.d/99-usb-sync.rules
+#
+# contributors: @megavolt (Manjaro Forum)
+#             : @linux-aarhus (Manjaro Forum)
+# inspired by : @kwg (EndeavourOS Forum)
+
 # rule to disable write cache for usb storage
 # requires hdparm to be installed
 ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"
-#
+
 # rules to impose buffer limits on USB devices
-# requires kernel > 6.1
-# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit
-# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio
-# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
-# implemented using  /usr/bin/udev-usb-tweak.sh 
-# optional configuration in /etc/udev-usb-tweak/udev-usb-tweak.sh
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/udev-usb-sync %k"
+# implemented using: /usr/bin/udev-usb-sync
+# see configuration: /etc/udev-usb-sync/udev-usb-sync.conf
+# Works since Linux 6.2
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="12",    RUN+="/usr/bin/udev-usb-sync %k 12"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="480",   RUN+="/usr/bin/udev-usb-sync %k 480"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="5000",  RUN+="/usr/bin/udev-usb-sync %k 5000"
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="10000", RUN+="/usr/bin/udev-usb-sync %k 10000"
diff --git a/PKGBUILD b/PKGBUILD
index 8b3edbf..2d1246c 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,8 +1,8 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.6
-pkgrel=2
-pkgdesc='Fine tune write cache when USB storage device is plugged'
+pkgver=0.8
+pkgrel=1
+pkgdesc='Fine tune write cache and impose buffer limites when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
@@ -10,15 +10,15 @@ depends=('hdparm')
 backup=("etc/${pkgname}/${pkgname}.conf")
 install="${pkgname}.install"
 source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
-sha256sums=('be08224041008876efb09e6b2a119d6f42b911efecf0563be413f9ff2d33a7b3'
-            '8d16ac2e912fa12c2ea79a8de4b94588b8f9e658fd8a3bf1e65bc8e5318c3140'
-            'bc902da2c453355e1dbc3a970a564daf71d41c6278dc771a930aa3badb90e453')
+sha256sums=('4f5888647d9be47a8992a7f5ea52eadd5baac0295a39751baa496815bddb065f'
+            'b514e3bf1ea55f5e1dc4f5af46da3b5f9f2409da1efe7b36a11647704faf0a8f'
+            '7cf194b2e3767f8ce4dcbf98b665e46d67624034d5ec0f4cb89f359b677c3687')
 
 package() {
     install -d -m755 "$pkgdir/etc/udev/rules.d"
     install -d -m755 "$pkgdir/etc/$pkgname"
     install -d -m755 "$pkgdir/usr/bin"
     cp "${srcdir}/99-usb-sync.rules" "${pkgdir}/etc/udev/rules.d"
-    cp "${srcdir}/${pkgname}" "${pkgdir}/usr/bin"
+    cp "${srcdir}/${pkgname}" "${pkgdir}/usr/bin/${pkgname}"
     cp "${srcdir}/${pkgname}.conf" "${pkgdir}/etc/${pkgname}"
 }
diff --git a/udev-usb-sync b/udev-usb-sync
index ccaab7e..1192dcb 100755
--- a/udev-usb-sync
+++ b/udev-usb-sync
@@ -1,18 +1,53 @@
 #!/usr/bin/bash
 #
-# script to tweak USB storage device filesystem sync
+# The script is part of udev-usb-sync package
 #
-# sources /etc/usb-dev-sync/usb-dev-sync.conf
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the Affero GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+#    @linux-aarhus - root.nix.dk
+#
+# configuration : /etc/usb-dev-sync/usb-dev-sync.conf
+# triggered by  : /usr/lib/udev/rules.d/99-usb-sync.rules
+#
+# contributors: @megavolt (Manjaro Forum)
+#             : @linux-aarhus (Manjaro Forum)
+# inspired by : @kwg (EndeavourOS Forum)
+#
+# Arguments provided by udev rule
+#     $1: usb block device
+#     $2: usb bandwidth reported by device
+#
+# default values (override in configuration file)
 #
 
+# block device is passed in $1
+# speed is passed as $2
+
+# defaults
 use_tweaks=1
-max_bytes=16777216
+use_bandwith=1
 max_ratio=50
 strict_limit=1
+max_bytes=16777216
+# speed defined values
+max_bytes_12=10485
+max_bytes_480=629145
+max_bytes_5000=655369
+max_bytes_10000=13107200
 
-# read user config
+# source configuratoin to override default values
 source /etc/udev-usb-sync/udev-usb-sync.conf
-
 if [[ "$use_tweaks" = 0 ]]; then
 	exit 0
 fi
@@ -21,6 +56,18 @@ if [[ -z "$1" ]]; then
 	exit 1
 fi
 
-echo "$max_bytes" > "/sys/block/$1/bdi/max_bytes"
+# if speed value is not present use default max_bytes
+[[ -z $2 ]] && use_bandwith=0
+
+# apply max_ratio
 echo "$max_ratio" > "/sys/block/$1/bdi/max_ratio"
+# apply strict limit
 echo "$strict_limit" > "/sys/block/$1/bdi/strict_limit"
+# apply max_bytes depending on speed value
+if [[ use_bandwith == 0 ]]; then
+	# apply default value
+	echo "$max_bytes" > "/sys/block/$1/bdi/max_bytes"
+else
+	# apply bandwidth defined value
+	echo "$max_bytes_$2" > "/sys/block/%1/bdi/max_bytes"
+fi
\ No newline at end of file
diff --git a/udev-usb-sync.conf b/udev-usb-sync.conf
index 31683ee..5e98857 100644
--- a/udev-usb-sync.conf
+++ b/udev-usb-sync.conf
@@ -1,5 +1,53 @@
-# default values 
+# The configuration file is part of udev-usb-sync package
+#
+# MIT License
+#
+# Copyright (c) 2023 Frede Hundewadt (@linux-aarhus)
+#
+# Permission is hereby granted, free of charge,to any person obtaining a copy
+# of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+#    @linux-aarhus - root.nix.dk
+#
+# configuration : /etc/usb-dev-sync/usb-dev-sync.conf
+# triggered by  : /usr/lib/udev/rules.d/99-usb-sync.rules
+#
+# contributors: @megavolt (Manjaro Forum)
+#             : @linux-aarhus (Manjaro Forum)
+# inspired by : @kwg (EndeavourOS Forum)
+#
+# The values used can be modified if you need to do so
+# The commented default usually works well
 #use_tweaks=1
-#max_bytes=16777216
+#use_bandwith=1
+
 #max_ratio=50
+# strict limit requires kernel >= 6.2
 #strict_limit=1
+
+# a sane default bandwidth value
+#max_bytes=16777216
+
+# bandwith based limitation requires >= 6.1
+# values as reported by the device ATTRS{speed}
+# These values seem to be good and stable.
+# It buffers 0,01s of the current bandwidth.
+#max_bytes_12=10485
+#max_bytes_480=629145
+#max_bytes_5000=655369
+#max_bytes_10000=13107200

From 7310b48b1db8bfada43a4f75dfd391f52c7376bd Mon Sep 17 00:00:00 2001
From: Frede Hundewadt <fhdk.6pmrw@8shield.net>
Date: Tue, 27 Aug 2024 11:20:31 +0200
Subject: [PATCH 22/23] Added catchall rule

---
 .SRCINFO          | 2 +-
 99-usb-sync.rules | 1 +
 PKGBUILD          | 4 ++--
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index e1d8868..45235ef 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -11,7 +11,7 @@ pkgbase = udev-usb-sync
 	source = 99-usb-sync.rules
 	source = udev-usb-sync
 	source = udev-usb-sync.conf
-	sha256sums = 4f5888647d9be47a8992a7f5ea52eadd5baac0295a39751baa496815bddb065f
+	sha256sums = 0c945450f8b472995c27ac4d0b41f333a49a7c8a181827cd57bb80e71194a6f3
 	sha256sums = b514e3bf1ea55f5e1dc4f5af46da3b5f9f2409da1efe7b36a11647704faf0a8f
 	sha256sums = 7cf194b2e3767f8ce4dcbf98b665e46d67624034d5ec0f4cb89f359b677c3687
 
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index 06ad118..2e92d01 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -39,6 +39,7 @@ ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bi
 # implemented using: /usr/bin/udev-usb-sync
 # see configuration: /etc/udev-usb-sync/udev-usb-sync.conf
 # Works since Linux 6.2
+ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/udev-usb-sync %k"
 ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="12",    RUN+="/usr/bin/udev-usb-sync %k 12"
 ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="480",   RUN+="/usr/bin/udev-usb-sync %k 480"
 ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="5000",  RUN+="/usr/bin/udev-usb-sync %k 5000"
diff --git a/PKGBUILD b/PKGBUILD
index 2d1246c..28bb441 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
 pkgver=0.8
-pkgrel=1
+pkgrel=2
 pkgdesc='Fine tune write cache and impose buffer limites when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
@@ -10,7 +10,7 @@ depends=('hdparm')
 backup=("etc/${pkgname}/${pkgname}.conf")
 install="${pkgname}.install"
 source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
-sha256sums=('4f5888647d9be47a8992a7f5ea52eadd5baac0295a39751baa496815bddb065f'
+sha256sums=('0c945450f8b472995c27ac4d0b41f333a49a7c8a181827cd57bb80e71194a6f3'
             'b514e3bf1ea55f5e1dc4f5af46da3b5f9f2409da1efe7b36a11647704faf0a8f'
             '7cf194b2e3767f8ce4dcbf98b665e46d67624034d5ec0f4cb89f359b677c3687')
 

From 5294f9cc53f2ee318a31f19ed1d0f140eccd7447 Mon Sep 17 00:00:00 2001
From: Frede H <fh@uex.dk>
Date: Wed, 11 Sep 2024 15:53:24 +0200
Subject: [PATCH 23/23] update rules - use auto calc for buffers based on
 hardware and speed

---
 .SRCINFO           |  9 +++---
 99-usb-sync.rules  | 21 ++++++------
 PKGBUILD           | 12 +++----
 udev-usb-sync      | 79 ++++++++++++++++++++++++----------------------
 udev-usb-sync.conf | 28 ++++++----------
 5 files changed, 72 insertions(+), 77 deletions(-)

diff --git a/.SRCINFO b/.SRCINFO
index 45235ef..d8b8141 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,18 +1,19 @@
 pkgbase = udev-usb-sync
 	pkgdesc = Fine tune write cache and impose buffer limites when USB storage device is plugged
-	pkgver = 0.8
+	pkgver = 0.9
 	pkgrel = 1
 	url = https://codeberg.org/wonky/udev-usb-sync
 	install = udev-usb-sync.install
 	arch = any
 	license = MIT
 	depends = hdparm
+	depends = bc
 	backup = etc/udev-usb-sync/udev-usb-sync.conf
 	source = 99-usb-sync.rules
 	source = udev-usb-sync
 	source = udev-usb-sync.conf
-	sha256sums = 0c945450f8b472995c27ac4d0b41f333a49a7c8a181827cd57bb80e71194a6f3
-	sha256sums = b514e3bf1ea55f5e1dc4f5af46da3b5f9f2409da1efe7b36a11647704faf0a8f
-	sha256sums = 7cf194b2e3767f8ce4dcbf98b665e46d67624034d5ec0f4cb89f359b677c3687
+	sha256sums = 14ff9fa9783f72cb321792ea8a44051d0eb0aaf244edec773d7fa16fdf8dc023
+	sha256sums = bdc35135e6f8074890a911a501ca4fb3e6a7888963b51c3a1edb98c23bb62ec2
+	sha256sums = ec26baede73e94f9cfab77cd5aa6e0ffebcc413ff657a4e98eae6c9e2145655e
 
 pkgname = udev-usb-sync
diff --git a/99-usb-sync.rules b/99-usb-sync.rules
index 2e92d01..292bdd6 100644
--- a/99-usb-sync.rules
+++ b/99-usb-sync.rules
@@ -31,16 +31,13 @@
 #             : @linux-aarhus (Manjaro Forum)
 # inspired by : @kwg (EndeavourOS Forum)
 
-# rule to disable write cache for usb storage
-# requires hdparm to be installed
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"
+KERNEL!="sd[a-z]", GOTO="usb_limit_write_cache_end"
+ENV{ID_USB_TYPE}!="disk", GOTO="usb_limit_write_cache_end"
+ACTION!="add|change", GOTO="usb_limit_write_cache_end"
 
-# rules to impose buffer limits on USB devices
-# implemented using: /usr/bin/udev-usb-sync
-# see configuration: /etc/udev-usb-sync/udev-usb-sync.conf
-# Works since Linux 6.2
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/udev-usb-sync %k"
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="12",    RUN+="/usr/bin/udev-usb-sync %k 12"
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="480",   RUN+="/usr/bin/udev-usb-sync %k 480"
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="5000",  RUN+="/usr/bin/udev-usb-sync %k 5000"
-ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", ATTRS{speed}=="10000", RUN+="/usr/bin/udev-usb-sync %k 10000"
+ATTRS{bDeviceClass}!="09", ATTRS{speed}=="10000", RUN+="/usr/bin/udev-usb-sync %k %s{speed}", GOTO="usb_limit_write_cache_end"
+ATTRS{bDeviceClass}!="09", ATTRS{speed}=="5000",  RUN+="/usr/bin/udev-usb-sync %k %s{speed}", GOTO="usb_limit_write_cache_end"
+ATTRS{bDeviceClass}!="09", ATTRS{speed}=="480",   RUN+="/usr/bin/udev-usb-sync %k %s{speed}", GOTO="usb_limit_write_cache_end"
+ATTRS{bDeviceClass}!="09", ATTRS{speed}=="12",    RUN+="/usr/bin/udev-usb-sync %k %s{speed}", GOTO="usb_limit_write_cache_end"
+
+LABEL="usb_limit_write_cache_end"
diff --git a/PKGBUILD b/PKGBUILD
index 28bb441..104c6f8 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,18 +1,18 @@
 # Maintainer: root.nix.dk
 pkgname='udev-usb-sync'
-pkgver=0.8
-pkgrel=2
+pkgver=0.9
+pkgrel=1
 pkgdesc='Fine tune write cache and impose buffer limites when USB storage device is plugged'
 arch=('any')
 url='https://codeberg.org/wonky/udev-usb-sync'
 license=('MIT')
-depends=('hdparm')
+depends=('hdparm' 'bc')
 backup=("etc/${pkgname}/${pkgname}.conf")
 install="${pkgname}.install"
 source=('99-usb-sync.rules' 'udev-usb-sync' 'udev-usb-sync.conf')
-sha256sums=('0c945450f8b472995c27ac4d0b41f333a49a7c8a181827cd57bb80e71194a6f3'
-            'b514e3bf1ea55f5e1dc4f5af46da3b5f9f2409da1efe7b36a11647704faf0a8f'
-            '7cf194b2e3767f8ce4dcbf98b665e46d67624034d5ec0f4cb89f359b677c3687')
+sha256sums=('14ff9fa9783f72cb321792ea8a44051d0eb0aaf244edec773d7fa16fdf8dc023'
+            'bdc35135e6f8074890a911a501ca4fb3e6a7888963b51c3a1edb98c23bb62ec2'
+            'ec26baede73e94f9cfab77cd5aa6e0ffebcc413ff657a4e98eae6c9e2145655e')
 
 package() {
     install -d -m755 "$pkgdir/etc/udev/rules.d"
diff --git a/udev-usb-sync b/udev-usb-sync
index 1192dcb..46a1df2 100755
--- a/udev-usb-sync
+++ b/udev-usb-sync
@@ -18,7 +18,7 @@
 #    @linux-aarhus - root.nix.dk
 #
 # configuration : /etc/usb-dev-sync/usb-dev-sync.conf
-# triggered by  : /usr/lib/udev/rules.d/99-usb-sync.rules
+# triggered by  : /etc/udev/rules.d/99-usb-sync.rules
 #
 # contributors: @megavolt (Manjaro Forum)
 #             : @linux-aarhus (Manjaro Forum)
@@ -28,46 +28,51 @@
 #     $1: usb block device
 #     $2: usb bandwidth reported by device
 #
-# default values (override in configuration file)
-#
 
-# block device is passed in $1
-# speed is passed as $2
+set -euo pipefail
 
-# defaults
-use_tweaks=1
-use_bandwith=1
-max_ratio=50
-strict_limit=1
-max_bytes=16777216
-# speed defined values
-max_bytes_12=10485
-max_bytes_480=629145
-max_bytes_5000=655369
-max_bytes_10000=13107200
+LANG=C
+LC_NUMERIC=C
 
-# source configuratoin to override default values
-source /etc/udev-usb-sync/udev-usb-sync.conf
-if [[ "$use_tweaks" = 0 ]]; then
-	exit 0
-fi
+AUTOCALC=${AUTOCALC:-1}
+CONFIG='/etc/udev-usb-sync/udev-usb-sync.conf'
 
-if [[ -z "$1" ]]; then
-	exit 1
-fi
+[[ -f $CONFIG ]] && source $CONFIG
 
-# if speed value is not present use default max_bytes
-[[ -z $2 ]] && use_bandwith=0
+BLOCKDEVICE="$1"
+SPEED="$2"
+KERNEL_MAJOR_VERSION=$(uname -r | awk -F'.' '{print $1}')
 
-# apply max_ratio
-echo "$max_ratio" > "/sys/block/$1/bdi/max_ratio"
-# apply strict limit
-echo "$strict_limit" > "/sys/block/$1/bdi/strict_limit"
-# apply max_bytes depending on speed value
-if [[ use_bandwith == 0 ]]; then
-	# apply default value
-	echo "$max_bytes" > "/sys/block/$1/bdi/max_bytes"
-else
-	# apply bandwidth defined value
-	echo "$max_bytes_$2" > "/sys/block/%1/bdi/max_bytes"
+# disable write cache for device if possible
+[[ -n $(which hdparm) ]] && $(which hdparm) -W 0 /dev/$BLOCKDEVICE
+
+if [[ $KERNEL_MAJOR_VERSION -le 5 ]]; then
+   # the following rules is introduced with kernel 2.6
+   # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio
+
+   # 1% of available RAM ->  8046522kB -> 80.465kB -> 80MB
+   echo 1 > /sys/block/$BLOCKDEVICE/bdi/max_ratio
+elif [[ $KERNEL_MAJOR_VERSION -ge 6 ]]; then
+    # the following rules is introduced with kernel 6.1
+    # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit
+    # https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes
+
+    # apply strict limit
+    echo 1 > /sys/block/$BLOCKDEVICE/bdi/strict_limit
+
+    if [[ ${AUTOCALC} == 0 ]]; then
+        # apply 16M as max_bytes
+        echo 16777216 > /sys/block/$BLOCKDEVICE/bdi/max_bytes
+    elif [[ ${AUTOCALC} == 1 ]]; then
+        BUFFER_TIME=${BUFFER_TIME:-"0.05"}
+        SAFETY_FACTOR=${SAFETY_FACTOR:-"1.3"}
+        BUFFER_SIZE=$(printf '%.0f' `echo "( ($SPEED / 8) * $BUFFER_TIME * $SAFETY_FACTOR) * 1024 * 1024" | bc`)
+        # for x in 12 480 5000 10000; do echo -n "$x -> " ;printf "%.0f\n" ` echo "(($x / 8) * 0.05 * 1.3) * 1024 * 1024" | bc`; done
+        # 62915
+        # 4089446
+        # 42593157
+        # 85196800
+        # apply calculated buffer size
+        echo "$BUFFER_SIZE" > /sys/block/$BLOCKDEVICE/bdi/max_bytes
+    fi
 fi
\ No newline at end of file
diff --git a/udev-usb-sync.conf b/udev-usb-sync.conf
index 5e98857..ee3beab 100644
--- a/udev-usb-sync.conf
+++ b/udev-usb-sync.conf
@@ -24,8 +24,8 @@
 #
 #    @linux-aarhus - root.nix.dk
 #
-# configuration : /etc/usb-dev-sync/usb-dev-sync.conf
-# triggered by  : /usr/lib/udev/rules.d/99-usb-sync.rules
+# trigger script: /usr/bin/usb-dev-sync
+# triggered by  : /etc/udev/rules.d/99-usb-sync.rules
 #
 # contributors: @megavolt (Manjaro Forum)
 #             : @linux-aarhus (Manjaro Forum)
@@ -33,21 +33,13 @@
 #
 # The values used can be modified if you need to do so
 # The commented default usually works well
-#use_tweaks=1
-#use_bandwith=1
+#
+#
+## Let it calculate based on given bandwidth
+#AUTOCALC=1
 
-#max_ratio=50
-# strict limit requires kernel >= 6.2
-#strict_limit=1
+## The time in seconds to hold data in RAM
+#BUFFER_TIME='0.05'
 
-# a sane default bandwidth value
-#max_bytes=16777216
-
-# bandwith based limitation requires >= 6.1
-# values as reported by the device ATTRS{speed}
-# These values seem to be good and stable.
-# It buffers 0,01s of the current bandwidth.
-#max_bytes_12=10485
-#max_bytes_480=629145
-#max_bytes_5000=655369
-#max_bytes_10000=13107200
+## multiplicator for safety reasons.
+#SAFETY_FACTOR='1.3'