Re: 2.6.23-rc7-mm1 AHCI ATA errors -- won't boot

From: Robert Hancock
Date: Tue Sep 25 2007 - 18:41:04 EST

Jeff Garzik wrote:
Berck E. Nash wrote:
Jeff Garzik wrote:
Once the blame has been squared fixed upon me :) you can use git-bisect
to locate the precise change that broke your setup.

Okay, here's the problem:

268fe6f9f15551be9abedd44a237392675d529d5 is first bad commit
commit 268fe6f9f15551be9abedd44a237392675d529d5
Author: Jeff Garzik <jeff@xxxxxxxxxx>
Date: Fri Sep 21 07:09:36 2007 -0400

[libata] SCSI: simple TEST UNIT READY simulation

It's trivial to ping the device, and that's a much more sane behavior
than no-op.

Signed-off-by: Jeff Garzik <jeff@xxxxxxxxxx>

:040000 040000 44d34cdad073bd623545b8239aca9a113652c6d0
df6d21f7ce56a4e796f8f856c1f647b0395ab4df M drivers

Thanks for debugging!

Can you tell me something about this device?

[ 49.045635] ata2.00: ATA-6: Config Disk, RGL10364, max UDMA/133
[ 49.051677] ata2.00: 640 sectors, multi 1: LBA
[ 49.056321] ata2.00: configured for UDMA/133

It seems like it does not support the 'check power mode' command.

Can you post a text file attachment, containing the output of 'hdparm --Istdout' ?

ATA spec says "The device shall return command aborted if the device does not support the Power Management feature set." Whereas TEST UNIT READY is required for SCSI. It seems the SAT authors didn't consider this case.

I assume we can tell from the identify data that the device doesn't support power management and just fake success for TEST UNIT READY in this case?

Robert Hancock Saskatoon, SK, Canada
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