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# -*- sh -*-
# vim:ft=sh:ts=8:sw=4:noet
AddConfigHandler DiskCacheOptions
AddConfigHelp "DisableWriteCacheOn <drive> [...]" "On some hardware the power is cut off before the disk has flushed its own hardware cache. List the devices that contain swap partitions (eg, /dev/hda) to disable the write cache before suspending."
DiskCacheDisable() {
local i
for i in $DISKCACHE_DISABLEDON ; do
if ! which hdparm > /dev/null ; then
vecho 0 "hdparm utility is not in PATH! Is it installed? Can not disable write cache."
return 1
fi
vecho 1 "$EXE: Disabling disk cache on $i"
hdparm -W 0 $i > /dev/null 2>&1
done
return 0
}
DiskCacheEnable() {
local i
for i in $DISKCACHE_DISABLEDON ; do
command -v hdparm > /dev/null || return 1
vecho 1 "$EXE: Enabling disk cache on $i"
hdparm -W 1 $i > /dev/null 2>&1
done
return 0
}
DiskCacheOptions() {
case $1 in
disablewritecacheon)
if [ -z "$DISKCACHE_DISABLEDON" ] ; then
AddSuspendHook 93 DiskCacheDisable
AddResumeHook 93 DiskCacheEnable
fi
DISKCACHE_DISABLEDON="$DISKCACHE_DISABLEDON $2"
;;
*)
return 1
esac
return 0
}
# $Id$
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