Re: Unexpected XFS SB number 0x00000000

Eric Sandeen
2007-12-10T23:20:13Z

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