Grub broken.

[Kok, Auke]

Chris Andrew wrote:
> Hi, all.
> 
> Thanks, Auke,
> 
>> root (hd0,0)
>> setup (hd0)
>> reboot
> 
> did the job and it now boots.  For some strange reason I am now
> getting an fcsk error 8 on /dev/hda2.
> 
> I tried /sbin/fsck -y /dev/hda2, boot it says that my superblock is
> missing or corrupt. Before I installed Lunar, I did an exhaustive HDD
> check, so I'm sure my HDD is ok.

ew. fortunately there are backup superblocks. To find out where they are, run
`mkfs.ext3` with the -n option so that it displays their location (but doesn't
actually format the filesystem):

# mkfs.ext3 -n /dev/hda2

then use fsck.ext3 with one of those numbers to see if it can be recovered:

# fsck.ext3 -b $BLOCKNUMBER /dev/hda2


warning: if the superblock is bad it's quite likely something trashed the
filesystem alltogether (like installing grub in the wrong location).

Auke


> 
> Can anyone help me get past this?  Failing that, I will try 1 fresh install.
> 
> Many thanks,
> 
> Chris.
> 
> 2008/8/12 Kok, Auke <sofar at foo-projects.org>:
>> Chris Andrew wrote:
>>> Can anyone tell me what I should type at the Grub > prompt to see what
>>> my menu.1st looks like?
>> Ive seen this bug and it's sometimes not even needed to fix a menu.lst file. At
>> the failed boot prompt you can `reinstall` grub on the fly:
>>
>>> root (hd0,0)
>>> setup (hd0)
>>> reboot
>> this will work if your /boot partition is /dev/sda and you had/want grub in the
>> mbr. if the above `setup` command works then grub will find your menu.lst file
>> again and hopefully it'll work
>>
>> if not then you can boot as follows:
>>
>>> root (hd0,0)
>>> kernel 2.6.2x root=/dev/sda2
>>> boot
>> and then try to use lunar to fix it (lin -c grub, lin -c linux-2.6)
>>
>> Auke
>> _______________________________________________
>> Lunar mailing list
>> Lunar at lunar-linux.org
>> http://foo-projects.org/mailman/listinfo/lunar
>>
> 
> 
>