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Old 01-23-2006, 03:22 AM   #1
vikram_cvk
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Registered: Jan 2004
Location: Hyderabad , India
Distribution: RHL 9
Posts: 42

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Unable to repair a filesystem


Hello Experts,

There was a power cut which lead to sudden switch off of my FC4 system. Once I rebooted I got the message as

/dev/hdb13:

The super block could not be read or does not describe a correct ext2 filesystem.Run e2fsck with an alternate super block

I tried the following


# fsck /dev/hdb13

# e2fsck -b 8193 /dev/hdb13

Also tried alternate super blocks

# e2fsck -b 32768 /dev/hdb13

# e2fsck -b 98768 /dev/hdb13

# e2fsck -b 163840 /dev/hdb13

# e2fsck -b 229376 /dev/hdb13

Whatever i try i get the same message i.e

The super block could not be read or does not describe a correct ext2 filesystem ....

I tried to run the rescue disk i.e FC4 CD 1 .. but when i try to boot from this CD ..its not booting but its going to a minimal GRUB shell .

What is the solution ... I tried to repair and I tried to run rescue CD but even this failed ... what is the solution for this ..

Im even unable to find the device label also i executed # e2label /dev/hdb13 but it says unknown command

Plz help me out.

Regards,
Vikram.
 
Old 01-23-2006, 04:47 AM   #2
carl0ski
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Registered: Sep 2004
Location: Melbourne, Victoria Australia
Distribution: Support those that support you :)
Posts: 872
Blog Entries: 12

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Quote:
Originally Posted by vikram_cvk
Hello Experts,

There was a power cut which lead to sudden switch off of my FC4 system. Once I rebooted I got the message as

/dev/hdb13:

The super block could not be read or does not describe a correct ext2 filesystem.Run e2fsck with an alternate super block

I tried the following


# fsck /dev/hdb13

# e2fsck -b 8193 /dev/hdb13

Also tried alternate super blocks

# e2fsck -b 32768 /dev/hdb13

# e2fsck -b 98768 /dev/hdb13

# e2fsck -b 163840 /dev/hdb13

# e2fsck -b 229376 /dev/hdb13

Whatever i try i get the same message i.e

The super block could not be read or does not describe a correct ext2 filesystem ....

I tried to run the rescue disk i.e FC4 CD 1 .. but when i try to boot from this CD ..its not booting but its going to a minimal GRUB shell .

What is the solution ... I tried to repair and I tried to run rescue CD but even this failed ... what is the solution for this ..

Im even unable to find the device label also i executed # e2label /dev/hdb13 but it says unknown command

Plz help me out.

Regards,
Vikram.
jump down to runlevel 1 and try again.

init 1

type; mount (just to make sure a hdb13 actually exists its an odd figure.)

if hdb13 does not exist
<b>open /etc/fstab and replace with a correct name</b>
else
<b>umount /dev/hdb13
mount should have told you what filesystem hdb13 was using FC4 is very new so i doubt its ext2 , it would be either ext3 or reiserFS
try

fsck.ext3 /dev/hdb13
fsck.reiser /dev/hdb13</b>
 
Old 01-23-2006, 05:02 AM   #3
dimsh
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Registered: Aug 2005
Distribution: Debian, Ubuntu, Fedora
Posts: 74

Rep: Reputation: 15
this person here has had the same problem, and it was solved with fsck.ext3 utility.

I am not good in ext FS, but hope this work for you.


Regards

Edit: did not realize that carl0ski have answered before me, sorry .

Last edited by dimsh; 01-23-2006 at 05:05 AM.
 
  


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