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Message-ID: <475DC056.3000502@sandeen.net>
Date: Mon, 10 Dec 2007 16:40:22 -0600
From: Eric Sandeen <sandeen@sandeen.net>
MIME-Version: 1.0
Subject: Re: Unexpected XFS SB number 0x00000000
References: <002a01c83b74$52060330$f6120990$@de>
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To: Chris <hsvchris@gmx.de>
Cc: linux-xfs@oss.sgi.com

Chris wrote:
> Hello!
> 
> I'm running a home file server with Debian GNU/Linux 4.0 4.0r1 etch
> (2.6.18-5-amd64 Kernel) and an Areca ARC-1220 hardware RAID controller.
> I used to have 4 750GB HDDs connected and set up as RAID 5 array, single
> volume, single XFS partition (set up during the installation of Debian). No
> problems so far.
> 
> Now I added another 750GB HDD to the array, online capacity/volume expansion
> by the controller finished just fine.
> My plan was to add the extra space to the above mentioned XFS partition. So
> I unmounted the partition, started cfdisk, removed the partition table and
> wrote a new one that included the new free space. 
> After rebooting the partition wasn't mounted, so I couldn't use xfs_growth
> to expand the filesystem.  
> 
> xfs_check: unexpected XFS SB magic number 0x00000000

Did your new partition table start in exactly the same place?

Can you find the string "XFSB" anywhere near where your old partition
started?

-Eric