Re: kern/40569: Faild RAIDframe parity rewrite prevents system shutdown

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR kern/40569; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: Matthias Scheler <tron%zhadum.org.uk@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: kern/40569: Faild RAIDframe parity rewrite prevents system shutdown
Date: Tue, 10 Feb 2009 23:12:38 +0100

 On Tue, Feb 10, 2009 at 05:42:49PM +0000, Matthias Scheler wrote:
 > On Tue, Feb 10, 2009 at 06:25:00PM +0100, Manuel Bouyer wrote:
 > > Could you check if a read on wd2 would trigger proper detection (obviously
 > > you have to remove the quirk entry first) ?
 > 
 > I'm 99% sure it does because I could construct the RAID previously when
 > RAIDframe read from "wd2" and wrote to "wd3" previously. The problems
 > started when it had to rewrite parity the other way around (with
 > "wd3" as the source).
 > 
 > > something like
 > > dd if=/dev/rwd2e of=/dev/null bs=32k skip=4194302 count=5
 > > should do it.
 > 
 > Is the above good enough? I would really like to avoid rebooting that
 > machine again as it is my server.
 
 I've reproduced it on a system here and I think I've a fix.
 Once again a DIAGNOSTIC kernel would have pointed right to the problem;
 I don't think removing DIAGNOSTIC from GENERIC (at last on -current)
 was a good move.
 
 Just to confirm; you're using a AHCI controller, right ?
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --