Re: Is My Data DESTROYED?!

[adfas asd <chimera_god@yahoo.com>]

I don't understand exactly what it is to be done.  If I can mount using a different superblock, do I then remove one of the drives from the array so I can put that drive away with my data until I can buy another drive to back up the data to?  If so, how?

How is it that the superblock on -both- drives got destroyed?  Isn't RAID10 supposed to be mirrored?

--- 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, 7:12 PM
> If you have bad sectors here
> & there, and you didn't read the areas where the bad
> sectors are, you won't get read errors.
> 
> That's why you should always have smartd running along
> with periodic sync_action -> check to force mdadm to
> check the array.
> 
> 
> 
> There's still hope in recovering your data. Don't
> despair.
> 
> On Fri, Oct 23, 2009 at 5:04 AM,
> adfas asd <chimera_god@yahoo.com>
> wrote:
> 
> 
> 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?
> 
> >
> 
> >
> 
> >
> 
> >
> 
> >
> 
> >
> 
> >
> 
> > --
> 
> >
> 
> > To unsubscribe from this list: send the line
> 
> > "unsubscribe linux-raid" in
> 
> >
> 
> > the body of a message to majordomo@vger.kernel.org
> 
> >
> 
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> >
> 
> >
> 
> >
> 
> >
> 
> > --
> 
> >        Majed B.
> 
> >
> 
> >
> 
> >
> 
> 
> 
> 
> 
> 
> 
> --
> 
> To unsubscribe from this list: send the line
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> 
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> 
> 
> 
> 
> -- 
>        Majed B.
> 
> 
>