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functions: update disks detection mechanism

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This commit is contained in:
Jan Vcelak 2012-01-11 12:39:47 +01:00
parent f11bae54bc
commit b5297bcc8c
1 changed files with 8 additions and 7 deletions
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15
tune-profiles/functions
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@ -7,7 +7,8 @@
# DISK tuning
#
DISKS="$(command ls -d1 /dev/[sh]d*[a-z] 2>/dev/null)"
DISKS_DEV="$(command ls -d1 /dev/[shv]d*[a-z] 2>/dev/null)"
DISKS_SYS="$(command ls -d1 /sys/block/{sd,cciss,dm-,vd}* 2>/dev/null)"
# SATA Aggressive Link Power Management
# usage: set_disk_alpm policy
@ -29,7 +30,7 @@ set_disk_alpm() {
# usage: set_disk_apm level
set_disk_apm() {
level=$1
for disk in $DISKS; do
for disk in $DISKS_DEV; do
hdparm -B $level $disk &>/dev/null
done
}
@ -37,7 +38,7 @@ set_disk_apm() {
# usage: set_disk_spindown level
set_disk_spindown() {
level=$1
for disk in $DISKS; do
for disk in $DISKS_DEV; do
hdparm -S $level $disk &>/dev/null
done
}
@ -49,12 +50,12 @@ multiply_disk_readahead() {
# float multiplication not supported in bash
# bc might not be installed, python is available for sure
readaheadvols=$(ls /sys/block/{sd,cciss}*/queue/read_ahead_kb 2>/dev/null)
for d in $readaheadvols; do
old=$(cat $d)
for disk in $DISKS_SYS; do
control="${disk}/queue/read_ahead_kb"
old=$(cat $control)
new=$(echo "print int($old*$by)" | python)
(echo $new > $d) &>/dev/null
(echo $new > $control) &>/dev/null
done
}