From: Xavier Nicollet <nicollet@jeru.org>
To: Dmitry MiksIr <miksir@maker.ru>, linux-btrfs@vger.kernel.org
Subject: Re: how to cleanup old superblock
Date: Tue, 26 Jun 2012 10:53:24 +0200 [thread overview]
Message-ID: <20120626085324.GC16957@jeru.org> (raw)
In-Reply-To: <20120625224900.GN28144@twin.jikos.cz>
Le 26 June 2012 ? 00:49, David Sterba a écrit:
> On Mon, Jun 25, 2012 at 11:54:50PM +0400, Dmitry MiksIr wrote:
> > Hello!
> > Long time ago I created btrfs on /dev/sda
> > After some changes btrfs moved to /dev/sda1 (well, to md, and sda1 is part
> > of md).
> >
> > As result, <btrfs fi show> show me 2 filesystems: new one and old one.
> > Probably I need to do some cleaning. Can someone tell me what to do.
>
> quick aid is to run this command:
>
> dd if=/dev/zero of=/dev/sda bs=1k count=4 seek=64
>
> (deletes just the btrfs superblock and will not touch anything
> else)
Updated the wiki:
https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#How_to_clean_up_old_superblock_.3F
--
Xavier Nicollet
next prev parent reply other threads:[~2012-06-26 8:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-25 19:54 how to cleanup old superblock Dmitry MiksIr
2012-06-25 22:49 ` David Sterba
2012-06-26 8:53 ` Xavier Nicollet [this message]
2012-06-26 10:17 ` David Sterba
2012-06-26 11:11 ` Sander
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