[NTLUG:Discuss] Bash Shell Script

[Wilson, David]

I am new to shell scripting and need a little assistance.  I am trying to
write a script that will copy a hard drive with dd in 640mg chunks.  I plan
on using a loop to accomplish this however I would like the condition of the
loop to terminate when dd reports an error.

For example,  script will have dd skip a variable number of blocks,  count a
number of blocks, write out to an incrementing file and then repeat.  When
dd gets to the end of the drive,  it should stop. 

Currently, I have to calculate the size of the drive in 512b blocks and then
use that value for determining when to stop copying. 

suggestions?


Thanks

David Wilson