sda2 is corrupted

[Jim]

On 07/05/2012 02:13 PM, Mark C. Allman wrote:
> On Thu, 2012-07-05 at 13:47 -0400, Jim wrote:
>> On 07/05/2012 01:23 PM, Mateusz Marzantowicz wrote:
>>> On 05.07.2012 19:15, Jim wrote:
>>>> Fedora 17
>>>>
>>>> the sda2 /home is corruoted and it changed /home partitiion to UNKNOWN
>>>> and it won't let me change the label back to /home
>>>>
>>>> I have tried to use fedora and Gparted with no luck.
>>>>
>>>> There are some important data files  I must save off of sda2
>>>>
>>>>
>>> 1. What is the type of that file system?
>> ext4
>>> 2. Can you paste error messages related to this partition?
>> No , Gparted can not mount it either
>>> 3. What happens after system reboot? Does it mount or not?
>> No , only  / is mounted
>>>
>>> Mateusz Marzantowicz
>>
> So when the system reboots you see a /dev/sda2 device, correct?
>
> When you type "mount /dev/sda2 /somewhere" (where "somewhere" is some
> existing, handy mount point) you get an error message saying that the
> file system isn't recognized or can't be determined?
>
> If you type "mount -t ext4 /dev/sda2 /somewhere" you get an error
> message, e.g., "not an ext4 filesystem?"
>
> What I would try next is running "e2fsck -n /dev/sda2" and see what that
> says.  The "-n" to insure nothing is written to the disk (just in case).
> Try it and post the results to the list here.  The partition superblock
> may be corrupted and I have no idea what e2fsck will try to do if that's
> the case.  It may just give up without looking at the backup superblock.
>
  # e2fsck -n /dev/sda2
e2fsck 1.42 (29-Nov-2011)
e2fsck: Superblock invalid, trying backup blocks...
Superblock has an invalid journal (inode 8).
Clear? no

e2fsck: Illegal inode number while checking ext3 journal for /home

/home: ********** WARNING: Filesystem still has errors **********