[ale] Re: bad XFS superblock

[John Trostel]

>From http://www.oss.sgi.com/projects/xfs/faq.html

You can not run xfs_repair on a mounted filesystem although support is
available in CVS (08-02-2002) that let's you run xfs_repair with the -n
switch on a read-only mounted filesystem. You must not try to repair a
mounted fs since this will result in dataloss and corruption when
attempted.
If you have to repair you're filesystem it needs to be unmounted first.
If this is the root (/) filesystem this will mean you have to boot from
a bootable CD and perform the repair on the unmounted filesystem. There
is a link to various bootable floppy/cd projects mentioned in the FAQ
here.

Did you run xfs-repair with the '-n' option? It should look for a
secondary superblock.

On Thu, 2003-11-13 at 14:53, ChangingLINKS wrote:

> From: "ChangingLINKS.com" <groups at ChangingLINKS.com>
> Subject: [ale] bad XFS superblock
> To: ale at ale.org
> Message-ID: <200311131144.05898.groups at ChangingLINKS.com>
> Content-Type: text/plain;  charset="us-ascii"
> 
> My Suse 8.2 crashed M$FT style while I was using ymessenger.
> When I tried to I reboot it, it gave an error (forgot the error but it 
> mentioned the filesystem). I tried rebooting several times and then I tried 
> using xfs_repair and xfs_check. Those attempts returned "bad superblock and 
> input/output error." By googling and testing, I came to understand that I 
> have a bad superblock. I tried mounting the HD on another machine - and it 
> would not mount (or even be recognized correcty by YAST2.
> However, the drive did get recognized by the BIOS, and if I use it as the 
> master, grub comes up and it dies right about the time it is trying to load 
> the filesystem.
> 
> I could not find anyone mentioning how to "fix" a superblock in XFS. Is it 
> possible for me to repair this filesystem, or am I SOL? The installation had 
> some nice information (bookmarks, history, special software installations) 
> and I would like to recover it if I can. Anyone?
> -- 
> Wishing you Happiness, Joy and Laughter,
> Drew Brown
> http://www.ChangingLINKS.com