From: jim owens <jowens@hp.com>
To: Andi Drebes <lists-receive@programmierforen.de>,
linux-btrfs@vger.kernel.org
Subject: Re: Unable to mount loopback devices in RAID mode
Date: Fri, 27 Nov 2009 10:57:45 -0500 [thread overview]
Message-ID: <4B0FF6F9.9010603@hp.com> (raw)
In-Reply-To: <20091127053336.GD25509@jsoft.dyndns.org>
Jean-S=E9bastien Trottier wrote:
> In the case of RAID1 (or even RAID10), what happens if loop0 is the
> current master but is corrupted/dead and you want to mount loop1 to
> recover your data?
The problem does not occur with raid1. In that case, both copies
are updated and either can mount. For raid10, 2 of the 4 devices
should always be mountable (you still have to find which 2).
The "guess who is the mountable device" problem occurs on raid0
and on the (not yet in-tree) raid5/6. Better error recovery is
one of the projects that needs to be done.
jim
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next prev parent reply other threads:[~2009-11-27 15:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-19 19:26 Unable to mount loopback devices in RAID mode Andi Drebes
2009-11-19 23:35 ` jim owens
2009-11-20 19:22 ` Andi Drebes
2009-11-27 5:33 ` Jean-Sébastien Trottier
2009-11-27 15:57 ` jim owens [this message]
2009-11-30 4:28 ` Jean-Sébastien Trottier
2009-11-30 13:09 ` jim owens
2009-11-30 19:25 ` Andi Drebes
2009-12-01 5:56 ` TARUISI Hiroaki
2009-12-01 10:27 ` Leszek Ciesielski
2009-12-01 23:52 ` TARUISI Hiroaki
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