FSCK or similar help please. Must fix corrupted drive.
 

Note: Probably wrong approach. Marked thread as solved because there was no real problem. Please disregard.

However, I've seen errors while trying to run FSCK, it never works on the raid (only data here!) or on the SSD. I've booted of CD or USB but get stuck when I can't FIX anything.

The disk in question is a genII OSX SSD, already once replaced for corrupted data.
When I try safe graphics mode or run disk check, I end up getting infinite (as in, there seems to be a loop) pages of errors. One of them is that blocks are incorrectly shared.

Badblocks doesn't get any hits.


Does anyone have any suggestions? I know my post is pretty lacking in technical details, but a "boot off this" or "plug computer into windows machine and run that" would go a long way in making me a happy person again. Thanks!

Tinsy bit more info. Loaded up Linux Mint and got in a terminal:

Your correct your post does not provide any information or IMHO a description of the actual problem.

/dev/sda references the entire drive and so does not contain a file system. The first part of the hard drive contains the master boot record which contains part of the boot code and partition table. fsck failing is normal.

/dev/sda1 is your boot partition.

/dev/sda2 is an extended partition which in a nutshell is a container for logical partitions. This allows one to create more then 4 partitions on with a MBR. fsck failing is normal since this also does not contain a file system.

/dev/sda5 is a logical partition that contains a LVM. LVM in a nutshell provides a method of allocating space on hard drives that is more flexible than conventional partitioning schemes. It in itself is not a file system and so fsck failing is again normal. You have not provided enough information but I would guess your / and possible swap file systems lie within the LVM and are called logical volumes.

In order to run fsck on logical volumes you need to determine find the pv’s, vg’s, lv’s and activate them. In general you do not want to run fsck on a mounted partition.

# lvm pvscan
# lvm vgscan
# lvm lvchange -ay /dev/VolGroup00/LogVol0 (as an example, this step activates the lv)
# lvm lvscan

# fsck /dev/VolGroup00/LogVol0 (Use the actual logical volume from the output of the lvm vgscan)

Thanks. A friend talked me through that at the same time.... Using mount to find path to root, I ran:
fsck -n /dev/mapper/ubunutu-root

which told me everything was clean. Does that sound reasonable, or do I need to do more digging?

That sounds reasonable but I still do not have a clear understanding of the problem.

The real issue is I can't log in. When I try to boot up in safe graphics mode, it wants to run fsck and puts out an unlimited number of pages of errors about stuff being double referenced (I can only assume it's since both partitions are sharing one physical space?)....

Perhaps the drive is ok and I should open another topic on the real issue. I thought it was hardware, but it could just be logging in that I'm having problems with.

Login Screen Returns to Login Screen, Ubuntu 12.10
 

Continuation of issues started in thread http://www.linuxquestions.org/questi...ve-4175442005/
Thought SSD was at fault, now not so sure.
-----------------------

After many many reboots in a couple days while experimenting with BIOS settings effecting the speed Hardbrake runs at, today I find after a reboot that I have to type in password to log in - ordinarily I have this disabled.

When I DO enter my password, it goes to a black screen for a bit, then returns. I can log in as guest, which does the same thing (minus the password) and if I use the wrong password, it complains instead of doing the same.

Using the install disc, I see three partitions on my drive, a ~200 MB boot sector, and two 32 GB (one extended) which seem to share the rest of the SSD.

Running FSCK seems to generate tons of errors.


The odd bits: All my background stuff is running - I can access stuff served by Subsonic, and see network shares from my windows machines. I can log in in another terminal and do stuff... I just can't get into the GUI/OS proper.

Sort of at a loss where to start. Would be happy to free drive of errors if I could (I've another machine, I could mount drive over USB and check it), but it seems everything else is working?

edit: Screensaver also seems to kick on, even from fsck's run from the boot menu.

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i3-2100t, H67 chipset I believe, 12.10, everything's been working fine for the better part of a year. Seen several similar topics, but either they turn out to be something unrelated (fresh install or known graphics issues) or there are no answers. I'm happy to get any logs/info anyone want.

---------------
Starting to think SSD is corrupted in some way that's preventing booting. Can't get FSCK to complete on it.

update: ran ""fsck -n /dev/mapper/ubunutu-root"" got the answer it was clean.

---------- Post added 12-18-12 at 08:56 PM ----------

Ok, here's a copy of my Xorg.0.log.old file:

and second half of log file:

From what I've seen on the web, the cause for the login / black / login is often (always?) the .xsession-errors file (with a huge size). I'm not sure what to do with this information myself; probably analyze the file for pointers to identify the problem or delete it.

I assume you can press <ctrl><alt><F1> to get to a console and login normally.

Makes me think I'm onto something.

Someone elsewhere came up with a clever "find all logged errors" command/script which I tweaked slightly.

Ran command:
MYLOG=/media/HBO-RAID/RAID-Storage/MyLog$(date +%T-%d.%m.%y).log; echo '['"code"']' >> ${MYLOG} && uname -a >> ${MYLOG} && lsb_release -a >> ${MYLOG} && for LOGFILE in $(ls /var/log/*.log); do sudo grep -iHw 'segfault\|warning\|error\|critical\|lightdm\|\(WW \)\|\(EE\)' $LOGFILE | tee -a ${MYLOG}; done && echo '['"code"']' >> ${MYLOG}

output:
No shortage of errors, many involving lightdm. Mean anything to anyone?

Specifically, the last line looks suspicious:
I WAS playing with the bios. Could I have accidentally turned off something it expects to see?