Re: Is My Data DESTROYED?!

[adfas asd <chimera_god@yahoo.com>]

How could this possibly have happened?  The whole idea of RAID is so something like this won't happen.

I was using JFS.

I've lost confidence now in mdadm.  I have too much data to back up practically, and am now at a loss.


--- On Thu, 10/22/09, Majed B. <majedb@gmail.com> wrote:

> From: Majed B. <majedb@gmail.com>
> Subject: Re: Is My Data DESTROYED?!
> To: "adfas asd" <chimera_god@yahoo.com>
> Cc: linux-raid@vger.kernel.org
> Date: Thursday, October 22, 2009, 6:40 PM
> Seems like your filesystem is
> corrupted. Some filesystems have alternative superblocks.
> 
> you can mount your filesystem using an alternative
> superblock using: mount -o sb=<offset>
> You find the offset value by running a dry-run (test) of
> mkfs on your drives. It will print multiple offsets for
> superblocks.
> 
> 
> 
> On Fri, Oct 23, 2009 at 4:36 AM,
> adfas asd <chimera_god@yahoo.com>
> wrote:
> 
> 
> Today I went in to my HTPC, to find it was hung and the
> drive light was stuck on.  After all attempts to revive it
> or switch to terminal 2 or 3 had failed I reset the system.
> 
> 
> 
> It rebooted to tell me that it cannot mount /home, the
> RAID10offset2 device.
> 
> 
> 
> When I reboot in recovery mode and try to mount /dev/md0
> manually it informs me there is an invalid superblock!  I
> shut down and unplugged each drive in turn, and /proc/mdstat
> shows the appropriate volume gone, but still can't mount
> the array.
> 
> 
> 
> 
> 
> What has happened here?  Is all my data destroyed?
> 
> 
> 
> 
> 
> 
> 
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> 
> 
> -- 
>        Majed B.
> 
> 
>