Add a small script to disable APM on ATA drives if they claim to support it. Leaving this on will kill drives long-term, especially laptop drives, by generating excessive Load Cycles.

The APM bit set will persist until the drive is power cycled, so it's necessary to run on each boot to be sure.

2 files changed, 13 insertions, 0 deletions

diff --git a/etc/rc b/etc/rc
index df54104..1934ee7 100755
--- a/etc/rc
+++ b/etc/rc
@@ -80,6 +80,9 @@ if [ ! "$PLATFORM" = "cdrom" ] ; then
 	fi
 fi
 
+# Disable APM on ATA drives. Leaving this on will kill drives long-term, especially laptop drives, by generating excessive Load Cycles.
+/etc/rc.disable_hdd_apm
+
 if [ ! "$PLATFORM" = "jail" ]; then
 	# Check to see if a compact flash mountpoint exists
 	# If it fails to mount then run a fsck -fy
diff --git a/etc/rc.disable_hdd_apm b/etc/rc.disable_hdd_apm
new file mode 100644
index 0000000..58f3734
--- /dev/null
+++ b/etc/rc.disable_hdd_apm
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+ATAIDLE=/usr/local/sbin/ataidle
+for i in /dev/ad?; do
+	SUPPORTED=`${ATAIDLE} ${i} | grep "APM Supported" | awk '{print $3;}'`
+	if [ "${SUPPORTED}" = "yes" ] ; then
+		echo Disabling APM on $i
+		${ATAIDLE} -P 0 ${i}
+	fi
+done