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[Fwd: Re: XFS restoration utility]

To: SGI XFS <linux-xfs@xxxxxxxxxxx>
Subject: [Fwd: Re: XFS restoration utility]
From: Patrick Ouellet <pouellet@xxxxxxxxxxxxxxxxxxxx>
Date: Mon, 02 Feb 2004 16:33:58 -0500
Sender: linux-xfs-bounce@xxxxxxxxxxx
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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.
Then they fight you. Then you win."
-Mahatma Gandhi
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