Another option for you, is to check out 'runtime.org'. Disclaimer... I do own some of their products and have had great success with them.
They have a "Disk Explorer for Linux v4.26".. don't know for certain if it will examine the drive you are having problems with, but it is worth a shot. They have a free download and it is $69.00 to purchase it.
They also have a free Live CD that is bootable and has their products embeded for use.
From: Jim <binarynut@xxxxxxxxxxx>
To: mcallman@xxxxxxxxxxxx; Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx>
Sent: Thursday, July 5, 2012 2:30 PM
Subject: Re: sda2 is corrupted
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 **********
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