Re: New SCSI subsystem in 2.4, and scsi idle patch

Alistair Riddell (
Mon, 10 Sep 2001 12:25:15 +0100 (BST)

On Sun, 9 Sep 2001, Phillip Susi wrote:

> 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

Alistair Riddell - BOFH
IT Manager, George Watson's College, Edinburgh
Tel: +44 131 447 7931 Ext 176       Fax: +44 131 452 8594
Microsoft - because god hates us

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