From: Josef Bacik <jbacik@fusionio.com>
To: Liu Bo <bo.li.liu@oracle.com>
Cc: <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH 4/4] Btrfs-progs: exhance btrfs-image to restore image onto multiple disks
Date: Thu, 20 Jun 2013 08:24:32 -0400 [thread overview]
Message-ID: <20130620122432.GA4288@localhost.localdomain> (raw)
In-Reply-To: <1371729930-22497-5-git-send-email-bo.li.liu@oracle.com>
On Thu, Jun 20, 2013 at 08:05:30PM +0800, Liu Bo wrote:
> This adds a 'btrfs-image -m' option, which let us restore an image that
> is built from a btrfs of multiple disks onto several disks altogether.
>
> This aims to address the following case,
> $ mkfs.btrfs -m raid0 sda sdb
> $ btrfs-image sda image.file
> $ btrfs-image -r image.file sdc
> ---------
> so we can only restore metadata onto sdc, and another thing is we can
> only mount sdc with degraded mode as we don't provide informations of
> another disk. And, it's built as RAID0 and we have only one disk,
> so after mount sdc we'll get into readonly mode.
>
Um that shouldn't be happening, the restore will mask out the RAID parts of the
chunk tree and it should work just fine. Are you using the most recent version
of btrfs-image? If this is happening it's a bug and we need to fix it, but I've
restored several file systems from users with raid0/10 file systems onto a
single disk and it's worked just fine. Thanks,
Josef
next prev parent reply other threads:[~2013-06-20 12:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-20 12:05 [PATCH 0/4] multiple disks restore support of btrfs-image Liu Bo
2013-06-20 12:05 ` [PATCH 1/4] Btrfs-progs: fix misuse of skinny metadata in btrfs-image Liu Bo
2013-06-20 12:05 ` [PATCH 2/4] Btrfs-progs: skip open devices which is missing Liu Bo
2013-06-20 12:05 ` [PATCH 3/4] Btrfs-progs: delete fs_devices itself from fs_uuid list before freeing Liu Bo
2013-06-20 12:05 ` [PATCH 4/4] Btrfs-progs: exhance btrfs-image to restore image onto multiple disks Liu Bo
2013-06-20 12:24 ` Josef Bacik [this message]
2013-06-20 12:39 ` Josef Bacik
2013-06-20 13:39 ` Liu Bo
2013-06-20 14:40 ` Liu Bo
2013-06-20 12:47 ` Chris Mason
2013-06-21 1:10 ` Chris Mason
2013-06-21 1:12 ` Liu Bo
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