Help with a little dd damage!

[Bill Davidsen]

Morgan Read wrote:
> Hi Folks
> 
> This post could equally be titled - is there a God?
> 
> Yesterday I ran this command:
> [root at morgansmachine DiskBUImagesEtc]# dd if=/dev/sda of=pocketpc.rescue 
> bs=1M count=33
> (No output, just bash history.)
> 
> Today I ran these commands:
> [root at morgansmachine DiskBUImagesEtc]# dd if=/dev/sda of=2ndstage.rescue 
> bs=1K count=1280
> 1280+0 records in
> 1280+0 records out
> 1310720 bytes (1.3 MB) copied, 0.0535238 s, 24.5 MB/s
> [root at morgansmachine DiskBUImagesEtc]# chown morgan: ./2ndstage.rescue
> [root at morgansmachine DiskBUImagesEtc]# dd if=zImage-LAB-20060421.htc 
> of=/dev/sda
> 2348+0 records in
> 2348+0 records out
> 1202176 bytes (1.2 MB) copied, 0.117155 s, 10.3 MB/s
> [root at morgansmachine DiskBUImagesEtc]#
> 
> Both yesterday and today I should not have used /dev/sda, but should 
> have used /dev/sdc...  Ouch...
> 
> Now I seem to have an unallocated partition of some 37.26GB where once 
> existed my carefully constructed laptop hard drive.
> 
> Everything seems to be running fine, but I expect if I reboot - I wont! 
>  I guess I've just wiped out my MBR or something close.
> 
> So, fingers firmly crossed, have I managed to copy enough of my hard 
> drive with the first two commands to be able to patch back the 
> catastrophic damage I seem to have done with the last command.  Could 
> someone more confident than I give me some instruction:)
> 
> Any help desperately welcome.
> 
Since you made a backup, probably no problem:
	dd if=./2ndstage.rescue of=/dev/sda count=2348
restore what you overwrote from what you saved.

-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot