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Re: re-using a damaged disk



On Sun, Jan 06, 2008 at 10:12:25PM +0100, pol wrote:
> Douglas A. Tutty wrote:
> 
> > How do you know its physically crashed?  If it is physically crashed,
> > the head are probably dead too.  If you try, what errors do you get?
> 
> The laptop fell about one meter to the floor, while it was running.
> I can't rmemeber the error messages, but they were sugegsting something
> unusal had happened. to the /usr partition. I cannot be mounted, so i get
> the prompt, login through the ash, a very limited number of commands
> available.
> Fsck'ed the /usr partition, everything should have been fixed, yet 'mount'
> cannot mount /usr - the same messages as at boot.
> 
> While the disk has been damaged, the heads seem to be working. 
> 
> > Try booting up a live CD like GRML, format the whole drive as one
> > filesystem having it check for badblocks.  Have tail -f /var/syslog
> > runing in another VT and watch the errors.  Also listen to the drive.
> > 
> 
> No noise from the drive.
> I'll give  GRML a try

Since its only the /usr directory (presumably its own partition), don't
reformat it or you'll have to reinstall.  If it's ext2/3, use
# e2fsck -c -c /dev/xxx

which will do a read/write/read/write of every block
	(read the existing data, write test data, read test data,
	compare, re-write existing data).  
	
It should also cause the drive to do its own badblock remapping if it
has spare blocks left.

Doug.


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