From: Mads Peter Bach <mpb@hum.auc.dk>
To: Jens Arnfelt <jens.arnfelt@ab-innovation.dk>
Cc: linux-raid@vger.kernel.org
Subject: Re: System halt when re-inserting a HotSwap SCSI in Soft RAID1
Date: Fri, 20 Sep 2002 15:03:33 +0200 [thread overview]
Message-ID: <3D8B1CA5.6090306@hum.auc.dk> (raw)
In-Reply-To: 3D8B1589.70502@ab-innovation.dk
Jens Arnfelt wrote:
> Hi There!
>
> I have two scsi disk with idendical partitiontables (see below)
> installed on a SCA HotSwap enable Fujitsu-Siemens server.
>
> As a test I've removed one of the disks and the /dev/md0 went in
> degraded mode as expected. (se snip from /var/log/messages below)
[snip]
> The real problems start when I re-insert the /dev/sda.
> The systems stops all activity on HD after some errore in the
> /var/log/messages and a hard reset is only option.
This isn't a soft raid problem, it's a SCSI layer issue:
(from the HOWTO)
"Hot-swapping with SCA
With SCA, it should be possible to hot-plug devices. However, I don't
have the hardware to try this out, and I haven't heard from anyone who's
tried, so I can't really give any recipe on how to do this.
If you want to play with this, you should know about SCSI and RAID
internals anyway. So I'm not going to write something here that I can't
verify works, instead I can give a few clues:
* Grep for remove-single-device in linux/drivers/scsi/scsi.c
* Take a look at raidhotremove and raidhotadd
"
Regards,
Mads Bach
next prev parent reply other threads:[~2002-09-20 13:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-16 21:02 Enable HTT with dual xeon fileserver ? raid
2002-09-18 9:53 ` Martin Eriksson
2002-09-18 10:49 ` Neil Brown
2002-09-19 18:42 ` Could not have the right MD device name on /proc/partitions bmoon
2002-09-20 1:02 ` Neil Brown
2002-09-20 12:33 ` System halt when re-inserting a HotSwap SCSI in Soft RAID1 Jens Arnfelt
2002-09-20 13:03 ` Mads Peter Bach [this message]
2002-09-20 13:18 ` RAID as backup C.Lee Taylor
2002-09-20 21:01 ` Alvin Oga
2002-09-21 2:07 ` Franc Carter
2002-09-23 8:45 ` C.Lee Taylor
2002-09-18 18:08 ` Enable HTT with dual xeon fileserver ? raid
2002-09-18 23:43 ` Martin Eriksson
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