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Re: Dead TP600X...

On Tue, 22 Jun 2004 13:47, "Brendan Dacre" <brendand@accsoft.com.au> wrote:
> I have not been able to find a way to set any cmos values and there is a
> hardware manual I have read which seems to imply it might be a motherboard
> fault.  So,

Try powering the machine on with the F1 key pressed and keeping it down.

> (1)  Has anyone encountered this problem?  And if so can it be "software"
> fixed?  If it is hardware then the laptop is going in the bin (or at least
> scavenged for parts).

One of the most valuable parts of the laptop is the screen, and it's also the 
most easily damaged.  It might be worth trying to find a working Thinkpad of 
the same model with a broken screen.

> (2)  Also, I would, one way or another, like to recover my data off the
> hard disk (about a month of e-mails which weren't backed up).  So I bought
> a 2.5" disk enclosure with a usb interface.  Although the computer was
> stuffed, I assumed that the hard disk would still be OK.
> However, I find that the partition table has been completely corrupted and
> I cannot read the reiser fs partition on the disk (from my new laptop
> running debian woody from a reiser fs partition).

Thinkpads have a variety of security options.  Did you happen to use a hard 
disk password?

It might be a good idea to run strings(1) on the block device and see if you 
recognise anything.  Something like
"strings /dev/whatever | grep ........................." should give you a 
good idea of whether encryption has been used.

> Assuming that only the partition table has been corrupted (and this is
> looking more and more hopeful rather than realistic) is there a way to
> recreate it without destroying the data and leaving the file system intact?
>  When you create a boot disk (from a debian woody install) at installation
> time, is it smart enough to save a copy of the partition table to this
> disk?

The first thing to do is to use dd(1) to copy the entire hard disk to another 
device.  If your hard disk happens to be failing then you want to get the 
data before it disappears!  I recommend doing this right now without any 
delay.  Even if your hard disk is in perfect condition you still want a 
backup in case your attempts to recover data screw things up.  Probably the 
best thing to do is to get another disk of similar size and try and use it 
for restoration.

The first partition on a disk starts at a fixed offset.  You can work out the 
size from looking at the ReiserFS superblock.  Below is the file(1) data for 
checking for ReiserFS.  If you have Reiser 3.6 (most likely) then at offset 
0x10000 there will be a little-endian long specifying the size of the file 
system.  Once you know this and the geometry of the original disk you should 
be able to work out where the next partition starts and repeat the process.

0x10034         string  ReIsErFs        ReiserFS V3.5
0x10034         string  ReIsEr2Fs       ReiserFS V3.6
>0x1002c        leshort x               block size %d
>0x10032        leshort &2              (mounted or unclean)
>0x10000        lelong  x               num blocks %d
>0x10040        lelong  1               tea hash
>0x10040        lelong  2               yura hash
>0x10040        lelong  3               r5 hash

http://www.coker.com.au/selinux/   My NSA Security Enhanced Linux packages
http://www.coker.com.au/bonnie++/  Bonnie++ hard drive benchmark
http://www.coker.com.au/postal/    Postal SMTP/POP benchmark
http://www.coker.com.au/~russell/  My home page

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