> I'm trying to get my 2.4.9 system to spin down my scsi disk(s) when idle.
> Aparently, this is supported on IDE disks, but not SCSI. I found an old
AFAIK, the spinning down of IDE disks is done by the disks themselves
rather than by the kernel. The software support consists of a method to
tell the disk controller what idle period to wait before spinning down.
I don't know whether SCSI disks have a similar feature. But if they did it
would be easier to make use of that than to implemement a software
timer...
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