From: Douglas McClendon <dmc.lists@filteredperception.org>
To: dm-devel@redhat.com
Subject: Re: DM_snapshot_cow filesystem (dmsetup create snapshot)
Date: Thu, 01 Dec 2011 14:26:14 -0600 [thread overview]
Message-ID: <4ED7E2E6.1010100@filteredperception.org> (raw)
In-Reply-To: <20111201202029.GC7595@agk-dp.fab.redhat.com>
On 12/01/2011 02:20 PM, Alasdair G Kergon wrote:
> On Thu, Dec 01, 2011 at 02:18:37PM -0600, Douglas McClendon wrote:
>> The overlay device in this situation is a read-write tmpfile in tmpfs,
>> looped to be available as the dm-snapshot 'snapshot/overlay device'.
>
> Ah - well if your base device is already read-only, then there is no
> corruption and you should be able to edit the bit of the disk image
> that says 'this image is invalid' and recover it read-only or extend it.
Can I get a commandline that summarizes how to do that 'edit'?
-dmc
next prev parent reply other threads:[~2011-12-01 20:26 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-29 11:19 DM_snapshot_cow filesystem (dmsetup create snapshot) Mr Dash Four
2011-10-29 20:49 ` Alasdair G Kergon
2011-11-27 22:31 ` Frederick Grose
2011-11-28 1:08 ` Douglas McClendon
2011-11-29 6:22 ` Frederick Grose
2011-11-30 2:09 ` Douglas McClendon
2011-11-30 21:48 ` Frederick Grose
2011-11-30 22:03 ` Alasdair G Kergon
2011-11-30 23:34 ` Douglas McClendon
2011-12-01 14:12 ` Alasdair G Kergon
2011-12-01 20:18 ` Douglas McClendon
2011-12-01 20:20 ` Alasdair G Kergon
2011-12-01 20:26 ` Douglas McClendon [this message]
2011-12-02 3:44 ` Douglas McClendon
2011-12-02 8:46 ` Alasdair G Kergon
2011-12-02 17:42 ` Frederick Grose
2011-12-01 20:21 ` Douglas McClendon
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