Bad magic number in super-block


 
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# 1  
Old 11-12-2003
Data Bad magic number in super-block

I am running mandrake 8.2 and when booting I get the message:

e2fschk: Bad magic number in super-block while trying to open /dev/hda8.

The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and really contains a valid an ext2 filesystem (and not swap or ufs or something else) then the superblock is corrupt and you might try running e2fsck with an alternative superblock:
e2fsck -b 8193 <device>
fsck ext3 Bad magic number in super-block while trying to open /dev/hda8
Couldn't find ext2 superblock, trying to back up blocks.

At this point it files to load any further and drops to a shell prompt.

Ran the above suggestion and get the same error

I have commented the following line out of the fstab and it now loads to a normal login prompt:

/dev/hda8 /home ext3 defaults 1 2

I have ran mke2fs -n /dev/hda8 and it says there are backups of the superblock at 229376, 294912, 819200, 884736, 1605632, 2654208 and 4096000. I have tried doing e2fsck -b on all these blocks and keep getting the same error.

Any ideas?
# 2  
Old 11-12-2003
Ok I'm getting really confused what has gone on with my system. I have been running mandrake on my system for over 6 months with no problem using the following fstab configeration:

/dev/hda5 / ext3 defaults 1 1
none /dev/pts devts mode 0620 00
none /dev/shm tmpfs defaults 0 0
/dev/hda8 /home ext3 defaults 1 2
/dev/hda1 /home/jay/windows/c: ntfs
/dev/hda6 /home/jay/windows/e: ntfs
/mnt/cdrom (etc)
/mnt/floppy (etc)
none /proc proc defaults 0 0
/dev/hda7 swap swap defaults 0 0

As I was getting the super-block error against hda8 I commented it out of the fstab.

As a last ditch attempt to get it working for some reason I decided to mount hda8 manually. I tried manually mounting it as ntfs and it mounted?? Checked what was on there and it was my windows e: drive?? For some reason the following has changed from:

hda1 = NTFS c:
hda2 = ??
hda5 = ext3 / (root)
hda6 = NTFS e:
hda7 = Swap swap
hda8 = ext3 /home

to:

hda1 = NTFS c:
hda2 = ??
hda5 = ext3 / (root)
hda6 = Not sure (Swap?? not mount yet so not 100% sure)
hda7 = ext3 /home
hda8 = NTFS e:

How has the above changed?? Possible because I installed Partition magic 8?? Although I installed it, it was only to create rescue disk to fix someone else computer as I needed to save some data for them. All I did was go into the program but never modified anything!!

Can anyone shed any light on this?
 
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