Re: Question about "Not Ready" SCSI error

[Stefan Richter]

Johannes Weiner wrote:
> On Sun, Jul 30, 2006 at 08:10:19PM +0200, Patrick Mau wrote:
> > Google revealed[1] that the drive is waiting for a START UNIT command,
> > but it seems that the kernel is not attempting to spin up the drive
> > again.
>
> I don't know exactly if it's enough to requeue the scsi command, please
> comment on this, guys.

AFAIU, the scsi_eh (error handler) already has proper code for exactly 
this purpose, but the code is inactive. Any driver (SCSI low-level 
driver or SCSI command set driver) can activate it by setting 
scsi_device->allow_restart = 1.

Brian King posted a patch which lets you enable that flag at runtime:
"scsi: Add allow_restart sysfs class attribute", 2006-06-27
http://marc.theaimsgroup.com/?l=linux-scsi&m=115142503103468

The patch is in Linus' tree now.
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=history;f=drivers/scsi/sd.c
--
Stefan Richter
-=====-=-==- -=== =====
http://arcgraph.de/sr/
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