topic Re: How use fsck command to repair /usr partition in Operating System - Linux

How use fsck command to repair /usr partition

debian111 — Wed, 07 Dec 2005 02:03:26 GMT

Good morning

When I turned my computer this morning--running linix Debian Sarge I got a message about forced checking my disks--mounted more than 30 times --checking forced.
Then when checking my /usr partition I got a message about an error.
After couple minutes it asks for root paswword to repair system manualy using command fsck....

what is syntax of fsck commandd to repair my /usr partition, I had never do this before
and I have very important data on my disk, so if you know what is solution for my problem please write it down.

I have root privileges, and I am root on this mashine.

Thank you in advance.

Re: How use fsck command to repair /usr partition

Muthukumar_5 — Wed, 07 Dec 2005 03:02:35 GMT

check the file system type as,

# df -T
# fsck.ext3 -s -v /usr

like that.

Re: How use fsck command to repair /usr partition

Bill Thorsteinson — Wed, 07 Dec 2005 10:51:44 GMT

You may want to edit /etc/default/rcS

There is an option there to add the -y flag
to fsck during startup. This will cause
fsck to automatically fix errors if it finds
them.

As root run 'fsck /usr'. It will prompt you
for each fix.
After it is done exit or reboot.

Re: How use fsck command to repair /usr partition

Ivan Ferreira — Wed, 07 Dec 2005 13:08:12 GMT

First, ensure that the /usr filesystem is not mounted using the command "mount" or "df". The /usr filesystem should not be mounted.

Then run the command:

fsck -f /usr -y

To repair the filesystem.

If you are using ext3, you can disable the check interval using

tune2fs -i 0 -c 0 /dev/

Re: How use fsck command to repair /usr partition

debian111 — Thu, 08 Dec 2005 02:05:28 GMT

I got following messsage when I turned on my machine:

current sda: Sense key Medium Error
Additional sense: Unrecovered read error-auto reallocate failed
end_request: I/O error, dev sda, sector 26585499
Error reading block 33558536 (Attempt to read block from filesystem resulted in short read) while doing inode scan.

after couple minutes scroling on screen it stoped and wrote next

current sda: Sense key Medium Error
Additional sense: Unrecovered read error-auto reallocate failed
end_request: I/O error, dev sda, sector 26585592
Error reading block 33558629 (Attempt to read block from filesystem resulted in short read) while doing inode scan.

/usr: UNESPECTED INCONSISTENCY: RUN fsck MANUALLY

and ask for root password.
I entered root password and as root enter next command as suggested some of you

#fsck -f /dev -y
tneh I got output

fsck.ext2 is directory while trying to open /usr

the superblock could not be read or does not describe a correct ext2 filesystem (and not swap or ufs or something else), then the superblock is corupted, you might try running e2fsck with an alternate superblock...

and then I run next command

#e2fsck -b 8193 /dev/sda6

then I got output like this

fsck.ext2 is directory while trying to open /usr

the superblock could not be read or does not describe a correct ext2 filesystem (and not swap or ufs or something else), then the superblock is corupted, you might try running e2fsck with an alternate superblock...

I do not know what to do in this situation, and I am compleatelly confused.

Thanks for your help.

Re: How use fsck command to repair /usr partition

bong_3 — Thu, 08 Dec 2005 03:09:10 GMT

have you tried fixing it by
#fsck -y /usr

Re: How use fsck command to repair /usr partition

debian111 — Thu, 08 Dec 2005 03:33:19 GMT

Yes, I tried and I got output I wrote in my previous thread.

Thank You for your sugggestions.

Re: How use fsck command to repair /usr partition

Alan_152 — Thu, 08 Dec 2005 10:24:30 GMT

Are you doing your fsck from single-user mode? Made sure the partition isn't mounted?

Re: How use fsck command to repair /usr partition

debian111 — Fri, 09 Dec 2005 01:35:09 GMT

Partittion is not mounted, I am trying to repair during booting system.

Re: How use fsck command to repair /usr partition

Ivan Ferreira — Fri, 09 Dec 2005 11:42:58 GMT

Are you sure the backup superblock is in 8193?

Do you have a backup of the partition? you may need to re-create the file system and restore the backup.