[CentOS] Recover RAID

Jeff Sadino jsadino.queens at gmail.com
Thu Mar 4 02:36:08 UTC 2010


Thanks for the insight.  Is there any way to bring it back to life not
necessarily as a raid, but just back up so I can get to the data and have my
license managers working?  What if I edit md1 out of the raidtab file?

Thanks,
Jeff

On Wed, Mar 3, 2010 at 4:12 PM, Christopher Chan <
christopher.chan at bradbury.edu.hk> wrote:

> On Thursday, March 04, 2010 10:09 AM, John R Pierce wrote:
> > Jeff Sadino wrote:
> >> Do you think I can copy the unknown partition from the second drive
> >> onto the first drive and have everything work again?
> >
> > if there's a md mirror, god knows what will happen when you boot it up
> > with both drives present, it oculd decide to mirror the unformatted
> > partition to the original, I've seen worse happen when the juju is
> > messed with.
>
> Well, he messed up a stripe. Zero chance of recovery.
>
>
> >
> > I think I'd totally wipe the drive you messed with, like zero it.   Then
> > boot up the system in single user with just the one drive you didn't
> > hose, and BACK UP EVERYTHING ON IT TO EXTERNAL SAFE MEDIA.  use dump or
> > something to do the backup that does a proper inode level backup of each
> > volume.   then add the wiped/blank drive, and remirror it with the mdadm
> > commands to repair the raid, then reboot to normal mode and see if its
> > all safe.
> >
>
> Won't apply. He can kiss md1 good bye.
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