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Date:      Fri, 15 Jan 2010 21:49:09 +0100
From:      Oliver Lehmann <lehmann@ans-netz.de>
To:        Alexander Motin <mav@FreeBSD.org>
Cc:        stable@freebsd.org, pjd@FreeBSD.org
Subject:   Re: 8-STABLE: gmirror segfaulting
Message-ID:  <20100115214909.42d3ca21.lehmann@ans-netz.de>
In-Reply-To: <4B50BFA2.10204@FreeBSD.org>
References:  <20100115163350.094a2e4c.lehmann@ans-netz.de> <4B50BFA2.10204@FreeBSD.org>

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Alexander Motin wrote:

> Interesting story, but I've lost the track. I can't say for sure what
> crashed gmirror without seeing any messages, but I suppose that after so
> dirty deconstruction of mirror and journals

Hm.. dirty? I used the standard tools ;)

> you may left some
> meta-information on devices. Restoring gmirror could make it accessible
> again. I would try to explicitly clear last few sectors of every
> disk/partition where something was living with dd to be sure that
> nothing left there.

Right now I've cleaned the whole ada1 disk, recreated the filesystems and
dump+restoreing the filesystems from ada0 to ada1. Then I'll switch ada1
andada0 and continue cleaning up the remaining disk. Then I'll gmirror
them again.

I could try to reproduce the error with my testsystem (have around 10 2GB
SCSI disks waiting for such a task) and log every command I typed. But -
is someone interested in fixing this? I already opened a PR for glabel
not working on top of gjournaled devices but it is open w/o any comment
for 2 month. Before I try to find a way of reproducing it I would know
that someone would work with the PR I'll create then. I don't like
feeding black holes ;)

-- 
 Oliver Lehmann
  http://www.pofo.de/
  http://wishlist.ans-netz.de/



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