On 20.04.2013 03:34, Wolfgang S. Rupprecht wrote:
Has anyone succeeded in spinning down disks under Fedora?
I've done the following and the "hdparm -C" does show the disk spun
down, but the next time I look it is spun up, and it stays up. The disk
is unmounted and I've stopped and disabled smartd, so it isn't accessing
the disks. I don't think anything else is either. I'm probably missing
a trick somewhere, but what???
disk=/dev/sdc
hdparm -S 120 $disk
hdparm -y $disk
hdparm -C $disk
yum info sdparm
…
: Warning: It is possible (but unlikely) to change SCSI disk settings
: such that the disk stops operating or is slowed down. Use with care.
i.e.
/usr/bin/diskungfu:
#!/bin/sh
# Disk stop - spin down
grep -w sdc /proc/diskstats >dstat.1st
sleep 60
grep -w sdc /proc/diskstats >dstat.2nd
if cmp dstat.1st dstat.2nd >/dev/null 2>&1
then
echo Stopping disk, spinning down…
sdparm -f -r -q -v -C stop /dev/sdc
exit 0
else
echo Disk busy.
exit 1
fi
EOF
Change the parameters as needed,
set-up a cron job,
and there you go. ;)
poma