From: "Jean-Sébastien Trottier" <jst1@email.com>
To: jim owens <jowens@hp.com>
Cc: Andi Drebes <lists-receive@programmierforen.de>,
linux-btrfs@vger.kernel.org
Subject: Re: Unable to mount loopback devices in RAID mode
Date: Sun, 29 Nov 2009 23:28:51 -0500 [thread overview]
Message-ID: <20091130042851.GG25509@jsoft.dyndns.org> (raw)
In-Reply-To: <4B0FF6F9.9010603@hp.com>
On Fri, Nov 27, 2009 at 10:57:45AM -0500, jim owens wrote:
> 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?
>=20
> 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).
Hmmm... But Andi's original post shows he was having this problem with
RAID1, no?
JST.
>=20
> 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.
>=20
> jim
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next prev parent reply other threads:[~2009-11-30 4:28 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
2009-11-30 4:28 ` Jean-Sébastien Trottier [this message]
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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