Subject: Re: [help] how to spin down sca hdds in SS5
To: henry nelson <netb@irm.nara.kindai.ac.jp>
From: Brian A. Seklecki <lavalamp@spiritual-machines.org>
List: port-sparc
Date: 07/15/2002 00:35:47
On Mon, 15 Jul 2002 @ 11:54am (+0900), henry nelson wrote:

hn> Thanks for all of the help everyone has given me.  As a result, I have
hn> 20020317-1.5.3_ALPHA running on a SparcStation 5, with two identical
hn> Seagate 2GB SCA drives, and most importantly, an sbus 10base2 nic in
hn> addition to the onboard le0.
hn>
hn> BIG PROBLEM.  The disks are going to burn up if I can't figure out a way
hn> to spin them down and keep them that way except for brief actual use periods.
hn> I used it once for about an hour, and you could poach eggs on those hdds!

...mmm, maybe umount(8) the filesystems on the disk, then use scsictl(8)
to 'detatch' the ID/LUN from the bus/chain.  This will minimize activity
on the disks. As for sending a signal to spin down...does one even exist?

...afaik, spinning down disks is part of the apm 1.1 spec that exists in
i386 hardware...no support exists for sparc.

anyone else?

-lava

hn> Where should I be looking?  Most of the material I have been reading about
hn> APM seems to be for laptops or ata.
hn>
hn> --
hn> henry nelson
hn>

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