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#1 (**permalink**) 01-05-2008, 05:12 AM

HELP
I have a 4.2.1 system that has 2 filesystems that have a bad
superblock. My FSCK commands aren't working for these filesystems. can
anyone have a QUICK FIX to get these filesystems back online??

thanks

#2 (**permalink**) 01-05-2008, 05:12 AM

Pulled directly from the AIX sysadmin manual:
http://www.redbooks.ibm.com/abstract...5129.html?Open

The problem can be resolved by restoring the backup of the superblock
over the primary superblock using one of the following commands:

dd count=1 bs=4k skip=31 seek=1 if=/dev/lv00 of=/dev/lv00

The following command works only for AIX 4.x.

fsck -p /dev/lv00

Once the restoration process is completed, check the integrity of the
file system by issuing the fsck command.

fsck /dev/lv00

In many cases, restoration of the backup of the superblock to the
primary superblock will recover the file system. If this does not
resolve the problem, recreate the file system and restore the data from
a backup.

--
Dana French

#3 (**permalink**) 01-05-2008, 05:13 AM

dfrench@mtxia.com wrote in message news:<1100647426.512912.139610@f14g2000cwb.googleg roups.com>...
> Pulled directly from the AIX sysadmin manual:
> http://www.redbooks.ibm.com/abstract...5129.html?Open
>
>
> The problem can be resolved by restoring the backup of the superblock
> over the primary superblock using one of the following commands:
>
> dd count=1 bs=4k skip=31 seek=1 if=/dev/lv00 of=/dev/lv00
>
> The following command works only for AIX 4.x.
>
> fsck -p /dev/lv00
>
> Once the restoration process is completed, check the integrity of the
> file system by issuing the fsck command.
>
> fsck /dev/lv00
>

THANKS
however, I'm running AIX v. 5.x is there a way to run a similar
command in version 5?
> In many cases, restoration of the backup of the superblock to the
> primary superblock will recover the file system. If this does not
> resolve the problem, recreate the file system and restore the data from
> a backup.

#4 (**permalink**) 01-05-2008, 05:13 AM

In article <d526473a.0411190926.26565d29@posting.google.com >, Ken <ucstyle@hotmail.com> wrote:
> dfrench@mtxia.com wrote in message news:<1100647426.512912.139610@f14g2000cwb.googleg roups.com>...
>
> however, I'm running AIX v. 5.x is there a way to run a similar
> command in version 5?

Yep, man page for fsck on a 5.2 system says it still supports -p.

-Dan

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BAD SUPERBLOCK