From: jahammonds prost <gmitch64@yahoo.com>
To: linux-raid@vger.kernel.org
Subject: Array Power Management
Date: Sun, 6 Sep 2009 20:48:03 -0700 (PDT) [thread overview]
Message-ID: <292245.77763.qm@web55804.mail.re3.yahoo.com> (raw)
I've been becoming interested in the power consumption of the arrays I have on a couple of servers here that are basically used as media servers. Since they're not being used when I'm at work, I was looking at the possibility of spinning the disks down during certain times, and having them either spin up at a set time, or (ideally), when there is disk activity.
I can do this on single drives using hdparm -S to set the spindown timeout, and the disks will spin up on activity as needed. Is there something similar I can do with an md array? I can see there's a /sys/block/md0/power/wakeup file, but I can't seem to find any documentation on it. I have thought about doing an hdparm -S on the array disks, but I suspect that would be A Bad Thing (tm).
Does anyone have any advice/pointers? The servers are currently running fc9 - I'd like them to be Centos, but had to go with fc9, as I needed Port Multiplier support.
Graham
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next reply other threads:[~2009-09-07 3:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-07 3:48 jahammonds prost [this message]
2009-09-07 9:57 ` Array Power Management Majed B.
2009-09-07 10:19 ` Jon Hardcastle
2009-09-07 14:02 ` jahammonds prost
2009-09-07 14:05 ` Majed B.
2009-09-07 12:55 ` Tapani Tarvainen
2009-09-07 13:37 ` jahammonds prost
2009-09-10 16:51 ` Matt Garman
2009-09-11 12:27 ` Ryan Wagoner
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