file system problem

[mummaneni]

Hi everybody,

I have a partition of size 18 GB on my FC4 system.

I accidentally overwrite this partition with dd command by a file of size 2 MB.

Now I am unable to mount the partition.

How can I recover my superblock from alternative super block.

Or please suggest any open source data recovery tools for ext3 file system.

Please help me.

Thanks Inadvance,
Mummaneni.

[twoHats]

Hi Mummaneni...

I looked up dd <never came across that one b4> and it says "Convert and copy a file" with tons of cryptic switches etc...

How converting and/or copying a 2MB file could wreck an 18MB partition is a mystery ... Unless(!)... ah but lets not guess.

First - in looking at fdisk man page i see:
============================

BE EXTREMELY CAREFUL if you use the dd command, since a small typo can make all of the data on your disk useless.
============================
This sounds ominous ...

I would try:

fdisk -l

See if you can spot your partition ...

Let us know ...

[mummaneni]

Hi,

The partition is being listed when i fdisk -l.
fdisk -l
/dev/hdc6 3266 9733 51954178+ 83 Linux

But the problem is i am unable to mount the partition.

# mount /dev/hdc6
mount: wrong fs type, bad option, bad superblock on /dev/hdc6,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so


I think super block might be corrupted.

Thanks & Regards,
Mummaneni.

[devils casper]

use 'fsck' command to check and fix filesystem.




casper