cannot boot into ubuntu 11.10, cannot mount filesystem

[pawanthegunner]

O.K, so this was a hellish day for me. I was running updates and there was power faliure (my ups is pretty messed up). so i re-booted in and ran

sudo dpkg --configure -a
as i always do to resume updates. But then again, right as i hit return, there was power faliure.
when i rebooted again, i had the grub screen with several options, i chose the top one(not recovery mode) and it took me to BusyBox inramfs or something like that.
all this time the caps-lock and num-lock indicators were blinking.

now i can't boot into my OS. I have only ubuntu 11.10 installed and only have one partition of the filesystem apart from swap.

when i boot from livecd and try to mount the filesystem, it shows :

mount: wrong fs type, bad option, bad superblock on /dev/sda1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so



dmesg | tail
gives following result :


ubuntu@ubuntu:~$ dmesg | tail
[ 1051.676347] Descriptor sense data with sense descriptors (in hex):
[ 1051.676350] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
[ 1051.676365] 04 84 35 42
[ 1051.676372] sd 2:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed
[ 1051.676380] sd 2:0:0:0: [sda] CDB: Read(10): 28 00 04 84 34 60 00 00 f0 00
[ 1051.676395] end_request: I/O error, dev sda, sector 75773250
[ 1051.676407] JBD: Failed to read block at offset 1448
[ 1051.676418] JBD: recovery failed
[ 1051.676423] EXT4-fs (sda1): error loading journal
[ 1051.676426] ata3: EH complete

trying to mount from terminal gives :

ubuntu@ubuntu:~$ sudo mount /dev/sda1
mount: can't find /dev/sda1 in /etc/fstab or /etc/mtab


i dont want to reinstall and lose thousands of MB of data...is there a way out of this?

[Rubi1200]

Hi,
just to make sure we know where everything is on the system, please post the results of the boot info script.

There is a link at the bottom of my post with instructions.

Thanks.

[oldfred]

Boot script should show us which partitions have issues or may show something else.

But if system is writing in the middle of a power failure, you need to run filechecks.

#From liveCD so everything is unmounted,swap off if necessary, change example shown with sdb1 to your partition(s)
#e2fsck is used to check the ext2/ext3/ext4 family of file systems.
sudo e2fsck -C0 -p -f -v /dev/sdb1
#if errors:
sudo e2fsck -f -y -v /dev/sdb1

[pawanthegunner]

thanks a lot guys. but the problem is solved. i ran

e2fsck
and it did the rest for me.
thread solved i guess. you people are great!:p

[Rubi1200]

Glad you got things sorted out.

Enjoy!