Messages in this thread | | | Date | Sun, 20 Nov 2005 00:57:43 +0000 | From | James Courtier-Dutton <> | Subject | Re: Does Linux support powering down SATA drives? |
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Marc Perkel wrote: > Trying to save power consumption. I have a backup drive that is used > only once a day to back up the main drive. So - why should I run it more > that 10 minutes a day? What I'd like to do is keep it in an off state > and then at night power it on, mount it up, do the backup, unmount it, > and shut it down. Can I do that? >
Support is being added soon, I think the latest 2.6.15-rc1 supports passthru. I had to install an extra patch due to a bug where it used the same IDE device irrespective of one asking for /dev/sda or /dev/sdb I think the fix will be in rc2.
hdparm -S60 works fine for me. It spins down, and therefore stay nices a cool. hdparm -y should work, and is like an immeadiate -S hdparm -Y is kind of dangerous at the moment. It powers down the drive, but will not come back unless the entire IDE bus goes through a reset. The feature to support that is called hotplug, but that is not implemented yet for SATA. So, basically, if you do hdparm -Y, you won't be able to wake it up again at the moment. At least hdparm -S60 is a start towards what you want.
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