RAID + Hard drive sleep

[Lucio M Nicolosi]

On Mon, Jan 31, 2011 at 1:00 PM, Steve Malenfant <smalenfant at gmail.com> wrote:
> I know I shouldn't probably do this and maybe it can't be done. But since I
> don't use my server that often I'd like my drive to sleep a little bit. I
> got the 1.5TB array up and running (From another thread) and both drives are
> using about 10W more than the laptop drive I had in there. Now this isn't
> much but I'm trying to save a little and see if those drive could
> sleep/standby.
> I believe I've seen this somewhere. But there might be too many logs written
> or other stuff going on (cron jobs, etc..). But I can disable some maybe.
> Is there any danger of setting the spindown on the hard drive on a MD array?
> If I force the drive to go to sleep (hdparm), then it spins back up right
> away. Is this caused by the array writing something to disk all the time?
> Any help would be appreciated.
> Thanks.

Regarding a desktop or server, I wonder if the spinning up and down of
a sleep configured HD wouldn't do more harm than letting it on all the
time.

-- 
L M Nicolosi, Eng.
GNU-Linux Regist. User #481505 - http://counter.li.org/
Ubuntu 10.10 AMD64