Thread: Hard drives won't spin down

hi all,
have bunch of hard drives in external enclosure, , want them standby after period of time. have xubuntu 12.10 (up-to-date) , open disks application in settings manager, , set every disk in enclosure have standby time of 20 minutes. set 1 of 8 disks standby using command in gui (i hear disk spin down).
25 minutes later, come , check disks hdparm -c /dev/sd*
disk spun down still on standby. disks set have timer of 20 minutes have not spun down.
disk array raidz2 pool, i'm pretty sure it's not case 7 other disks accessed 1 put on standby not. seems more ubuntu not respecting standby timer setting. tried explicit hdparm -s 240 /dev/sd* , still didn't work.

can make system standby drives after designated time?

thanks,
vandervecken

standby , raid (z or not) dangerous combination. if set disks jbod (just bunch of disks) each disk independent , standby should work correctly. if have system files on raid pool wake frequently.

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