Subject: Re: scsi sub-system
To: Marshall Midden <firstname.lastname@example.org>
From: Jason Thorpe <email@example.com>
Date: 12/18/1996 10:33:58
On Wed, 18 Dec 1996 11:09:10 -0600
"Marshall Midden" <firstname.lastname@example.org> wrote:
> If a disk drive is set up with the jumper on that says don't spin up
> with power-up, you can run into problems if the disk accidently loses
> power and then gets powered back up.
> The kernel doesn't power it back up.
> After you pull the jumper and get it spinning, you can read the raw disk,
> but a ccd (active file system) still can't access the drive... .
Hmm, ouch. So... what errors did the scsi subsystem report when it was
unable to spin the disk back up?
Ok, so take a look at sdopen()... You'll note that the disk is sent
a START only on the _first_ open. It may be possible to detect the
error condition, attempt to re-spin the disk, and requeue the
> reboot, and fsck -f did not show any problems whatsoever.
Well, that's good, at least :-)
> Back to collecting tons of data, only losing 3 minutes worth of data.
> (still a very fast reboot and fsck of a huge file system!)
Jason R. Thorpe email@example.com
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