[Ocfs2-users] Dinode signature problem

[Sunil Mushran]

Hmmm... I've seen this issue once before and on a similar setup. As in, 
firewire
(Oxford 911 chipset). It literally is a one-bit corruption. The 
signature INODE01
becomes KNODE01. As far as I remember we never could duplicate it. As it was
only on one firewire setup and not on any fiber/iscsi/xen setups, we did 
not spend
much time on it.

First, backup:
dd if=/dev/sdX of=/tmp/backup bs=<blocksize> count=1000

To fix:
# dd if=/dev/sdX  of=blk17 count=1 skip=17 bs=<blocksize>
# dd if=/dev/sdX  of=blk23 count=1 skip=23 bs=<blocksize>

Use your favorite bin editor and change the first K to an I.

# dd of=/dev/sdX  if=blk17 count=1 seek=17 bs=<blocksize>
# dd of=/dev/sdX  if=blk23 count=1 seek=23 bs=<blocksize>

The fs should be umounted during this escapade.

Also, maybe you should look at iscsi for your shared storage needs.

Valan Franklin wrote:
> Dear All:
>  
> I am building an Oracle 10G R2 cluster as outlined in Jeffrey Hunter's 
> article 'Build your own Oracle 10g Release 2 Cluster on Linux and 
> Firewire'. However I'm experiencing problems with the OCFS2 filesystem 
> on the shared drive. After the system boots up and the device is 
> mounted to the directory /u02/oradata/orcl, the kernel displays the 
> error message "OCFS2: ERROR (device sda1): ocfs2_meta_lock_update: 
> Dinode # 17 has bad signature KNODE01  File system is now read only 
> due to the potential of on-disk corruption. Please run fsck.ocfs2 once 
> the file system is unmounted.". After running fsck.ocfs2 to fix the 
> problem, the same message appears again. I did notice this happens to 
> dinode # 17 and 23 only. I upgraded ocfs2 to the latest version, 
> 1.2.1.1, but the problem still appears. I also checked the Maxtor 
> drive using their Powermax disk utility and it reported the drive is 
> clean. Any help with this problem is appreciated.
>  
> The shared drive (Maxtor DiamonMax 80G ATA/133) is in a Nspire 
> NSP-ED352C external drive enclosure with Firewire (Oxford 911 chipset) 
> and USB interfaces.
>  
> System specs:
> CentOS 4.2 
> ocfs2 ver 1.2.1.1
> Firewire cards with VIA chipsets
>  
> Thank you very much.
>  
> Sincerely,
>  
> Valan Franklin, OCP
> (905) 634 6137 Home
> v.franklin at sympatico.ca <mailto:v.franklin at sympatico.ca>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>