On Sun, Sep 06, 2009 at 08:48:03PM -0700, jahammonds prost wrote: > 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). On the same note, does anyone have any thoughts on the wear-and-tear caused by frequent spinup/spindown cycles? My fileserver has the Western Digital RE2 "enterprise" grade drives. I remember reading (years ago) that, in general, "enterprise" grade drives were designed to be always running (think 24/7 server), and rarely spun down. As such, they did not tolerate a "consumer desktop" usage pattern very well, and trying to save power in this way would actually cause them to fail prematurely. Is/was such a thing true? Is it worth worrying about? Thanks, Matt -- 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
