Thread: Cannot mount system partition

i think have killed system partition (which sadly contains personal data): when starting computer see "error: unknown filesystem" , grub rescue promt. here did: booted ubuntu-live-system via usb while regular ubuntu 11.10 system in hibernate.

when run fdisk -l within live system, see:

code:

   device boot      start         end      blocks   id  system /dev/sda1              63      401624      200781   de  dell utility /dev/sda2   *      401625    56612976    28105676    7  hpfs/ntfs/exfat /dev/sda3        56614910   488396799   215890945    5  extended /dev/sda5        56614912   470808575   207096832   83  linux /dev/sda6       470810624   488396799     8793088   82  linux swap / solaris

now when try mount sda5 or sda3 using "sudo mount -r -t ext4 /dev/sdax /mnt", get: wrong fs type, bad option, bad superblock, missing codepage or helper program, or other error" , dmesg contains following:

code:

[ 5925.202725] ext4-fs (sda5): vfs: can't find ext4 filesystem [ 6025.811834] attempt access beyond end of device [ 6025.811843] sda3: rw=0, want=4, limit=2 [ 6025.811852] ext4-fs (sda3): unable read superblock

i'm totally desperate, there can try recover data?

in advance,
m

you can try testdisk (you can download , run in live mode).
first read manual on page, , if have doubts ask first before doing anything!
can save partition, easy can destroy it. never needed use it, people report excellent results.

sda3 can not mounted, extended partition. getting error when trying mount sda5 not good.

ps. forgot testdisk link: http://www.cgsecurity.org/wiki/testdisk

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