On Thursday June 22, marc@xxxxxxxxxxx wrote: > Marc L. de Bruin wrote: > > > Situation: /dev/md0, type raid1, containing 2 active devices > > (/dev/hda1 and /dev/hdc1) and 2 spare devices (/dev/hde1 and /dev/hdg1). > > > > Those two spare 'partitions' are the only partitions on those disks > > and therefore I'd like to spin down those disks using hdparm for > > obvious reasons (noise, heat). Specifically, 'hdparm -S <value> > > <device>' sets the standby (spindown) timeout for a drive; the value > > is used by the drive to determine how long to wait (with no disk > > activity) before turning off the spindle motor to save power. > > > > However, it turns out that md actually sort-of prevents those spare > > disks to spindown. I can get them off for about 3 to 4 seconds, after > > which they immediately spin up again. Removing the spare devices from > > /dev/md0 (mdadm /dev/md0 --remove /dev/hd[eg]1) actually solves this, > > but I have no intention actually removing those devices. > > > > How can I make sure that I'm actually able to spin down those two > > spare drives? This is fixed in current -mm kernels and the fix should be in 2.6.18. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
