Help with a little dd damage!

[Brian Chadwick]

Ian Malone wrote:
> Brian Chadwick wrote:
>> Morgan Read wrote:
>
>>> [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]#
>>>
>
>>> 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:)
>
>> sorry ... dd is final ... it did what you said as a root user. dont 
>> you love linux ... it does EXACTLY what you say when you are root.
>>
>
> The point was Morgan has an accidental sort-of backup of the bit
> he dd-ed over.
>
he copied 1280 blocks .... then overwrote it with 2348 blocks ... the 
damage is done