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Re: kern/37866: Thinkpad T61 disk doesn't work in AHCI mode
The following reply was made to PR kern/37866; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost,
Subject: Re: kern/37866: Thinkpad T61 disk doesn't work in AHCI mode
Date: Fri, 25 Jan 2008 22:02:57 +0100
On Fri, Jan 25, 2008 at 12:40:00AM +0000, smb%cs.columbia.edu@localhost wrote:
> >Number: 37866
> >Category: kern
> >Synopsis: Thinkpad T61 disk doesn't work in AHCI mode
> >Confidential: no
> >Severity: serious
> >Priority: medium
> >Responsible: kern-bug-people
> >State: open
> >Class: sw-bug
> >Submitter-Id: net
> >Arrival-Date: Fri Jan 25 00:40:00 +0000 2008
> >Originator: Steven M. Bellovin
> >Release: NetBSD 4.99.49
> Department of Computer Science, Columbia University
> System: NetBSD yellowstone.machshav.com 4.99.49 NetBSD 4.99.49 (YELLOWSTONE)
> #0: Mon Jan 21 23:10:45 EST 2008
> Architecture: x86_64
> Machine: amd64
> Much of the time, if I boot my machine with the disk set in the
> BIOS to AHCI mode, it doesn't see the whole disk. This causes
> errors in finding the NetBSD partition and the root partition,
> and if you persist you'll overwrite random parts of the disk,
> including things outside of what NetBSD should be touching.
> It is not 100% reproducbile. In tests today, it didn't happen
> if I rebooted from power-off; it did happen if I warm-booted.
> This suggests a bug in the initialization code.
This is a known issue, and it's most probably timing-related in
the PHY setup code (probably between the "link up" and the IDENTIFY
command). unfortunably I can't reproduce this issue on my systems.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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