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Old 11th December 2010, 03:15 AM
serari Offline
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Join Date: Dec 2010
Posts: 1
can't mount hard drive


I was doing a kernel upgrade (from the recommended updates) the other night, and right in the middle of the update process the power went out. When i try to reboot my machine, grub gives me 2 kernel options:

1. FC < If i try to boot from this one I get: Error 13: Invalid or unsupported executable format, then returns to grub. I think this was because it didnt finish updating the kernel, I don't know for sure though.

2. FC 2.6.34-7-61.fc13.x86_64 < If i try to boot from this, it starts processing some stuff and attemp[ing to boot. Then it gets to a kernel panic:
not syncing: VFS: Unable to mount root fs on unkown-block(0,0)
Pid: 1, comm: swapper not tainted #1
Call Trace:
[<ffffffff8144abc5>] panic0x78/0xf8

It has a bunch more lines like that, not sure if they are important or not.

The first time i tried to reboot after this had happened it had gone to a different screen and told me I should run "fsck". I did that and answered yes to everything it asked. It completed, and now I am at the step described above.

So i downloaded FC14 and tried to mount my harddrive in an attempt to save some files. All that displays about my harddrive in /dev is sda, sda1, sda2. sda1 mounts just fine, but it has the partition with all of the kernels (i think this is the boot partition). The other 2 (I dont think you are actually supposed to be able to mount sda???) do not mount, when I try they simply say the device, or the directory I am mounting to is busy or already mounted. I looked all over to see if those drives were mounted somewhere else, but they werent - the directory was free also.

At this point, Im not sure if my OS is recoverable. Worst case scenario I can easily just re-install. I am just REALLY hoping i can salvage some of the files i have in my home directory.

Does anyone have some advice?

Thanks in advance.
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Old 11th December 2010, 04:04 AM
jbkt23 Offline
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Join Date: Mar 2006
Posts: 673
Re: cant mount hard drive

In the absence of any other reply here I would suggest that you google 'testdisk' and read up on that tool. It actually comes with fedora so should be available to you in rescue mode from an install disk. To me it sounds like the fschk happened on a mounted disk which just about screws every thing.
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Old 11th December 2010, 10:47 AM
glennzo Offline
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Join Date: Mar 2004
Location: In your closet
Posts: 15,564
Re: can't mount hard drive

Hello serari. The manual pages on the mount command show an option called remount. Perhaps this may be what you're looking for. For example
mount -o remount,rw /dev/sda1 /mnt/temp
Might be worth a look.
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