[TriLUG] Spinning down a SCSI drive

[David Brain]

You could try something like:

echo "scsi remove-single-device" 0 0 1 0 > /proc/scsi/scsi

That should set it up for hot removal, which you would hope would
include spining it down.

Of course it won't come back until you do:

echo "scsi add-single-device" 0 0 1 0 > /proc/scsi/scsi

You can get the scsi id stuff the '0 0 1 0' (host:bus:device:lun) info
from the command 'lssci'

David.

On 4/7/06, Owen Berry <oberry at trilug.org> wrote:
> I have in my possession an old Sun Ultra Enterprise 2 server, which I
> received for the bargain price of $0. It has 2 very noisy SCSI drives in
> it, and while I'm figuring out what to do with this prize possession, I
> was wondering if there is a way to spin down the SCSI disks when running
> off a live CD.
>
> I tried using hdparm -Sx, but from the output the action wasn't
> supported by the drive. I should have written it down before shutting
> off the machine (doh!) but it was something to the effect of
> unrecognized parameter. And no, it wasn't hdparm that was complaining
> about -S, it looked more like a response from the device.
>
> I also looked for some of the scsi-xxxx tools on the livecd, but
> couldn't find anything. Not sure if that's 'cos they weren't there, or
> if those tools are obsolete.
>
> I guess I could unplug the drives for now, but in the back of my mind
> I'm wondering if I can set something up where I run off a live cd, and
> have a ramdrive that synchs with the hard drive on startup and shutdown
> for writeable data, with the drives being shutdown the rest of the time.
> Maybe a little crazy. :-)
>
> Any other suggestions?
>
> Thanks,
> Owen
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