Corrupt FC4 journal file? How to recover?

[clivelong]

Hi,

I just booted my FC4 2.6.15 machine and got the following two error messages

JBD: Failed to read block at offset ....
EXT3-fs: error loading journal

And then the machine just hangs.

This occurs whichever kernel I try to boot from

A bit of googling turned up the following suggestion

1. Boot into Linux rescue mode from the install disks - DONE OK, except says no installations are found.

2. Run command : tune2fs -O ^has_journal

Well this command is in /usr/sbin. But when I run it all I get back is a number of lines that tell me the correct syntax of the tune2fs command - I can't seem to run the command.

Can anyone help?

Thanks

Clive

[clivelong]

Also when I try

tune2fs -O -f ^has_journal

I get the following error message

tune2fs: No such file or directory while trying to open ^has_journal
Couldn't find valid filesystem superblock

I have done a fair amount of googling and looked the man pages for this command but I can't work out how to get around this.

All I am trying to do is temporarily remove the journal file, dump the user data to a USB connected disk, reformat/ replace the laptop disk (hopefully marking bad sectors as unusable) and reload Fedora.


Other messages that cycle past

hda: task_out_intr: status=0x51 {DriveReady SeekComplete Error }
hda: task_out_intr: error=0x04 {DriveStatusError }
ide: failed opcode was: unknown

I am focussing on the Journal file as that is the one that throws up errors early on in the boot process.

Can anyone give me ideas on how to get tune2fs working so I can them attempt this backup?

Thanks

Clive

[anupam9]

/sbin/tune2fs -O ^has_journal /dev/hda7

tune2fs 1.38 (30-Jun-2005)
/sbin/tune2fs: Bad magic number in super-block while trying to open /dev/hda7
Couldn't find valid filesystem superblock.

This is due to restoring my partition from Ghost Image (norton ghost 2002) after merging 2 small 5GB partitions into one big 10GB partition using Partition Magic. My FC5 partition earlier was "unknown 8e" as reported by QtParted and still is - after Ghost restore, even though size is now double.

How can I fix this :
1. Total size of partition to report correctly 10GB
2. Type should be ext3 - not "unknown".