It is currently Sun, 18 Nov 2018 03:52:50 GMT



 
Author Message
 Help with corrupt partition table

Hi,

I've got a drive who's partition table seems to be corrupt.  I had
just installed a new kernel and was running LILO.  Unfortunately,
I hit a control-C while doing this.  I ran it again, and it completed
with no errors.

When I rebooted the machine, I found that LILO was ok, but after loading
the zImage of the new kernel, I end up with the following error:

        VFS: unable to mount root filesys on 08:02

Can anyone offer suggestions on what to do to be able to access this
disk again?  I assume that LILO doesn't know where the root partition
starts.  Here's what I've tried so far:

* Norton Disk Utilities - couldn't find partitions since it looks
for DOS signatures.  Did see that there is data on the disk.

* Used fdisk in "expert" mode to adjust the cylinders, heads and sectors,
but even after writing the data, it doesn't get stored - it resets back to
1019 cylinders (the documentation for the drive says there are 4076).
Anyone know why?

* Tried guessing at the partition locations.

* Tried running a C program sent to me that looks for apparent
partition locations based on some hex signatures.  It doesn't seem to
be locating the partitions as accurately as it did on a working drive,
but then again I can't test it since fdisk won't store the new cylinder
values I give it.

Any help is appreciated.  Please email as well as post, as our news
machine is not quite up to snuff.

--
Omar Thameen
o...@inch.com



 Sun, 24 Jan 1999 03:00:00 GMT   
 Help with corrupt partition table

Hi,

I've got a hard drive that seems to have a corrupt partition table,
though the data appears to be ok.  I had just compiled a new kernel
and was running LILO.  I hit control-C before it finished, and then
ran it again (no errors were reported).  When I rebooted, the zImage
loaded, then I got the following error message:

VFS: unable to mount root filesystem on 08:02

I assume this is because the kernel doesn't know where the root
filesystem is anymore because of the corrupt partition table.  Does
anyone know how to rebuild it?  

When I try to use the "expert" mode of fdisk to input the number of
cylinders, the value won't hold - it keeps defaulting back to 1019,
even though I am writing the information.  (the drive documentation
says there are 4076).

Here's what I've tried so far:

        Used Norton Utilities:  saw that there was data, but couldn't do
        much since it's for DOS.

        Ran a C program sent to me that looks for the hex signature of
        a partition.  It doesn't seem to be as successful as it is on
        another disk that is fully functional.  It does find the partitions
        there.

        Tried guessing at the partition locations.  This is ineffective
        because I can't give fdisk the right number of cylinders as
        described above.  I did try guessing using 1019 cylinders, but
        no luck.

Any help is appreciated.
--
Omar Thameen
o...@inch.com



 Sun, 24 Jan 1999 03:00:00 GMT   
 Help with corrupt partition table

Hello omar,

I don't know how to fix a partition table but i have some experiance with it.
I resently copy a disk with 2 hpfs partitions and a OS/2 bootmanager on a 1GB drive
to a 2Gb drive with dd from linux boot flop,
so the partition table on the 2Gb drive should be the same as on the 1Gb drive. When i looked at the
partitions with fdisk from Linux it seems to be corupted, and the disk did not boot.
Fdisk said that the drive has about 400 cylinders but the documantation says 2048.
I fixed this with an option in the scsi bios. I disabled
the translation of the disk cheometry from disks bigger as 1Gb(DOS can't go beyond 1024 cylinders) And now
the partition table seems OK and OS/2 boots.



 Tue, 26 Jan 1999 03:00:00 GMT   
 
   [ 3 post ] 

Similar Threads

1. Help, install corrupts partition table

2. help - please urgent help needed to get back the lost or corrupted partition table

3. Partition Table corrupt - Disk Geometry problems, need help!

4. Partition table corrupted - help!

5. HELP: Partition table corrupted!


 
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by ST Software