[Fwd: Re: XFS restoration utility]

[Patrick Ouellet <pouellet@xxxxxxxxxxxxxxxxxxxx>]

I recent this mail to the list so that archive are complete.

And I'm adding answer to a question you asked me about sending
you the kernel message when I try to mount the drive.

Here is the dmesg output ( I stripped everything that's related to booting)

FAT: bogus logical sector size 28783
VFS: Can't find a valid FAT filesystem on dev 03:41.
SGI XFS 1.3.1 with ACLs, no debug enabled
SGI XFS Quota Management subsystem
XFS: bad magic number
XFS: SB validate failed

The FAT & VFS message is related to when I try to mount the drive
without specifying the filesystem type. ( mount -t xfs )

> > Hi, im new to xfs never used it personnaly but
> > the other day I realised that our Linksys EFG80 NAS
> > was working on xfs filesystem

> Hm, very interesting... :)

> > My problem is that the drive in this NAS has been corrupted
> > in someway, and I would like to salvage data on this drive.
> >
> > So I put the drive in a Linux machine, installed the XFS kernel
> > supplied of oss.sgi.com web site. But when I try to mount the drive
> >
> > mount -t xfs /dev/hdb1 /mnt/nas   

> Just to be sure, how do you know it's really xfs on-disk?

The unit is composed of two disk, the second one didn't fail and I was able
to mount the drive and use it with XFS. And before I installed the XFS 
enabled kernel, when I tried to mount the drive I had the error message:
mount does not support XFS filesystems

> > I get these errors:
> >
> > XFS: bad magic number
> > XFS: SB validate failed
> > mount: wrong fs type, bad option, bad superblock on /dev/hdb1
> > or too many mounted filesystems    

> try "dmesg' to see what kernel messages may have come from
> the failed mount.


> > Is there a way for me to restore this drive, is there any utility that
> > can be downloaded to restore this drive?
   

> Ask linksys... ;-)  if it's really xfs, and they haven't munged
> it too much, you could try xfs_repair. (with -n to do a dry run
> first)

 
HAHAHA when I contacted live support at Linksys, they were unable to tell me
the exact type of filsystem used on their device, they could only tell 
me it was a Linux based system, so a linux based filesystem.


> -Eric
 

Thanx Eric for your comments, questions and answers.

> Thanx for your time.
>
> --
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> Patrick Ouellet - pouellet@xxxxxxxxxxxxxxxxxxxx
> Administrateur des serveurs reseaux
> Informatique - Poste 130
> Microtec Technologies inc.
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> "First they ignore you. Then they laugh at you.
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