I ran fsck on my mounted file system (I know, I shouldn't have). Now it won't boot. I get a kernel panic message.

I booted to a Knoppix Live Cd.

The desktop icon shows /dev/sda2 mounted at /media/sda2. When I perform ls -l on /media/sda2 it shows total 0.

When I perform dumpe2fs /dev/sda2 I get this message:
dumpe2fs 1.40-WIP (14-Nov-2006)
dumpe2fs: Bad magic number in super-block while trying to open /dev/sda2
Couldn't find valid filesystem superblock.

Is there any chance of recovering data from the drive or am I out of luck?

What does 'fdisk -l' say? Or 'testdisk /debug /log /list /dev/sda'? Testdisk and Photorec should be on the KNOPPIX CD/DVD.

root@Knoppix:/home/knoppix/Desktop# fdisk -l

Disk /dev/sda: 80.0 GB, 80032038912 bytes
255 heads, 63 sectors/track, 9730 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 9730 78051802+ 8e Linux LVM

-----------------------------------------------------------------

root@Knoppix:/ramdisk/home/knoppix# testdisk /debug /log /list /dev/sda
testdisk: error while loading shared libraries: libntfs.so.9: cannot open shared object file: No such file or directory

Looks like it can see the drive but can't access or mount it.

Additional Information:

root@Knoppix:/ramdisk/home/knoppix# fdisk -l /dev/sda1

Disk /dev/sda1: 106 MB, 106896384 bytes
255 heads, 63 sectors/track, 12 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sda1 doesn't contain a valid partition table
root@Knoppix:/ramdisk/home/knoppix# fdisk -l /dev/sda2

Disk /dev/sda2: 79.9 GB, 79925045760 bytes
255 heads, 63 sectors/track, 9717 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sda2 doesn't contain a valid partition table

do the following as root user and provide us the results
pvdisplay
vgdisplay
lvdisplay


lvdisplay should tell us what partitions have been created on your LVM partition. I assume you're using a RedHat/Fedora based Linux distro?

root@Knoppix:/ramdisk/home/knoppix# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name VolGroup00
PV Size 74.41 GB / not usable 0
Allocatable yes
PE Size (KByte) 32768
Total PE 2381
Free PE 1
Allocated PE 2380
PV UUID 34v31h-rQS5-Lzjd-WuQC-F1EA-DnE2-Sj1ugr

root@Knoppix:/ramdisk/home/knoppix# vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 74.41 GB
PE Size 32.00 MB
Total PE 2381
Alloc PE / Size 2380 / 74.38 GB
Free PE / Size 1 / 32.00 MB
VG UUID dhzswy-nDmJ-l32M-bTwJ-5tue-Qn1k-Ie9aad

root@Knoppix:/ramdisk/home/knoppix# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID fhLm4I-YxGM-uPrp-p54E-L0BZ-6RB1-4p9njg
LV Write Access read/write
LV Status NOT available
LV Size 72.44 GB
Current LE 2318
Segments 1
Allocation inherit
Read ahead sectors 0

--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID eFHGdu-0lUm-x2qa-vlJD-hayB-20ZT-wbJfYl
LV Write Access read/write
LV Status NOT available
LV Size 1.94 GB
Current LE 62
Segments 1
Allocation inherit
Read ahead sectors 0

Yes, I am running Redhat FC-7.

btncix, does the lvdisplay info provide any helpful information?

If I start the FC-7 install disk will it be able to see this installation and repair it? Or will it just overwrite it?