[Ocfs2-users] restore deleted partition

[Sunil Mushran]

Run fsck.ocfs2 with the backup superblock specified.
manpage has the details.

Also, look into making use of the (r)dump command in debugfs.ocfs2
to retrieve selected data.

Best of luck.

Christian Lox wrote:
> Hi all.
>
> We are using (or should i say "have been using"...) ocfs2 in  
> conjunction with iscsitaget and open-iscsi.
>
> Now yesterday happened what should not have happened:
> A colleague set up a new subversion server and remembered there was a  
> kind of storage to use for it.
> He used the open-issi tools to discover the partition and used mkfs on  
> it. So he was just fine and could continue his work. :)
> But:
> Our main fileserver lost all its data.
>
> Apr 24 18:38:21 rad01 kernel: [4310373.927492]  
> (4211,0):o2hb_do_disk_heartbeat:767 ERROR: Device "sdb": another node  
> is heartbeating in our slot!
>
> And some hours later:
> Apr 25 06:25:19 rad01 kernel: [4351792.508496]  
> (1292,0):ocfs2_check_dir_entry:1778 ERROR: bad entry in directory  
> #197799: rec_len is smaller than minimal - offset=0, inode=0,  
> rec_len=0, name_len=0
>
> When trying to mount our (formerly) ocfs2 partition:
>
> root at rad01:/# mount -t ocfs2 /dev/sdb /ocfs2
> ocfs2_hb_ctl: Bad magic number in inode while reading uuid
> mount.ocfs2: Error when attempting to run /sbin/ocfs2_hb_ctl:  
> "Operation not permitted"
>
> This is on ubuntu 7.10, Linux rad01 2.6.22-14-server #1 SMP Sun Oct 14  
> 23:34:23 GMT 2007 i686 GNU/Linux
>
> Any chance to recover the data?
>
> Thanks in advance,
> Christian
>
>
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