Problem with JFS

[Adam Antal]

Hi *!

We have problem with a JFS filesystem:
fsck says invalid superblock and cannot find any alternate superblocks.

Any idea?

THX

Adam

[Stefan Farrelly]

your filesystem is corrupt. Try mounting it read only and copy the data off elsewhere, or try the latest fsadm/jfs patches, then retry the fsck, if these fail then yourve lost your filesystem - recover from backup.

[Robert-Jan Goossens]

Hi Adam,

Could you give me the fsck commands you used.

Robert-Jan

[G. Vrijhoeven]

Hi Adam,

Dis you try?

fsck -F xvfs -o full /dev/vg??/rlvol?

Gideon

[Adam Antal]

Hi,

I've tried
fsck -F vxfs -o full -y /dev/VGW99/sapdb
with following messages:
invalid super-block
search for auxiliary super-block? (ynq)y
alternate super-block not found
vxfs fsck: cannot initialize aggregate
file system check failure, aborting ...

Bye

Adam

[Adam Antal]

Hi,

I've also tried mount -ro, the result is:

mount -o ro /sapdb
mount: /dev/VGW99/sapdb is an invalid operand

Bye

Adam

[G. Vrijhoeven]

Hi,

1) the fsck is on the rlvol.
2) Is you lvol the same size as your filesystem bdf /sapdb vs. lvdisplay /dev/VGW99/sapdb

Gideon

[Adam Antal]

Hi Gideon,

here the result of fsck on the rlvol:

# fsck -F vxfs -o full,nolog -y /dev/VGW99/rsapdb
pass0 - checking structural files
pass1 - checking inode sanity and blocks
pass2 - checking directory linkage
pass3 - checking reference counts
pass4 - checking resource maps
OK to clear log? (ynq)y
set state to CLEAN? (ynq)y


If I do a ls -l in the /dev/VGW99 directory, I see the following result of the rlvol:
crw-r----- 1 root sys 64 0x020002 Jul 2 12:45 rsapdb

but the lvol seems bad:
-rw-rw-rw- 1 root sys 324844 Jan 21 2001 sapdb

Bye

Adam

[G. Vrijhoeven]

Hi,

You should recreate your lvol device file:

mv /dev/VGW99/sapdb /dev/VGW99/sapdb.org
mknod /dev/VGW99/dapdb b 64 0x020002

Gideon

[Adam Antal]

Hi Gideon,

thank you for your help, it works!

Bye

Adam

[Elmar P. Kolkman]

Seems it is time for point assignment then. ;-)