unable to mount home partition

English Install/Boot/Login
#1

after many power cuts and restarts, i’m unable to mount home partation any more,
i tryed to boot from the live image and mount the partation but get the following error:

linux:/home/linux # mount /dev/sda10 /my_home
mount: wrong fs type, bad option, bad superblock on /dev/sda10,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

linux:/home/linux # dmesg | tail
  171.926732] EXT4-fs (sda9): 553 orphan inodes deleted
  171.926736] EXT4-fs (sda9): recovery complete
  172.030347] EXT4-fs (sda9): mounted filesystem with ordered data mode. Opts: (null)
  174.173055] EXT4-fs (sda10): ext4_check_descriptors: Checksum for group 0 failed (47339!=0)
  174.173060] EXT4-fs (sda10): group descriptors corrupted!
  335.714140] EXT4-fs (sda10): ext4_check_descriptors: Checksum for group 0 failed (47339!=0)
  335.714146] EXT4-fs (sda10): group descriptors corrupted!
  366.817104] EXT4-fs (sda10): ext4_check_descriptors: Checksum for group 0 failed (47339!=0)
  366.817109] EXT4-fs (sda10): group descriptors corrupted!
  712.330072] perf samples too long (2502 > 2500), lowering kernel.perf_event_max_sample_rate to 50000

i tryed to use fsck to check the partation file system and i got :

linux:/home/linux # fsck /dev/sda10
fsck from util-linux 2.23.2
e2fsck 1.42.8 (20-Jun-2013)
ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap
fsck.ext4: Group descriptors look bad... trying backup blocks...
fsck.ext4: e2fsck_read_bitmaps: illegal bitmap block(s) for /dev/sda10

/dev/sda10: ***** FILE SYSTEM WAS MODIFIED *****

gparted:

GParted 0.16.2

Libparted 2.4
Check and repair file system (ext4) on /dev/sda10 00:00:00 ( ERROR )

calibrate /dev/sda10 00:00:00 ( SUCCESS )

path: /dev/sda10
start: 206356480
end: 266227711
size: 59871232 (28.55 GiB)
check file system on /dev/sda10 for errors and (if possible) fix them 00:00:00 ( ERROR )

e2fsck -f -y -v -C 0 /dev/sda10

ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap
e2fsck: Group descriptors look bad… trying backup blocks…

/dev/sda10: ***** FILE SYSTEM WAS MODIFIED *****
e2fsck 1.42.8 (20-Jun-2013)
e2fsck: e2fsck_read_bitmaps: illegal bitmap block(s) for /dev/sda10

now i intended to format the partation any way but i need 3 text files stored on it so i desprite need to recover the partation

#2

On 2014-03-19 20:36, bedo wrote:
>
> after many power cuts and restarts, i’m unable to mount home partation
> any more,

You will have to invest on an UPS.

> now i intended to format the partation any way but i need 3 text files
> stored on it so i desprite need to recover the partation

photorec/testdisk

foremost http://foremost.sourceforge.net/
http://en.wikipedia.org/wiki/Foremost_(software)

Foremost is a forensic data recovery program for Linux
used to recover files using their headers, footers, and data structures
through a process known as file carving.[3] Although written for law
enforcement use, it is freely available and can be used as a general
data recovery tool.[2]

ext4magic There is also some commercial software, apparently.

–
Cheers / Saludos,

Carlos E. R.
(from 13.1 x86_64 “Bottle” at Telcontar)

#3

If fsck can not repair it, the file system is broken.

Better create a new file system in the partition and restore your data from your backup.

#4

no up-to date backups, but i was able to recover the files using an app called PhotoRec http://www.cgsecurity.org/wiki/PhotoRec
it was pretty light and quick…

thats solves my problem, many thanks