Shell Programming and Scripting

Hi

Can anyone please help with the following script I need - .ksh preferably?

I have external disks attached to a system that I have to label and then run the dd command on all external disk found.

I have kicked off the dd command as follows manually to see what its output is like first and what it throws back:

dd if=/dev/zero of=/dev/dsk/c0t0d0s2 bs=8192

and this doesn't seem to give an exit status or come back to the unix prompt? Should I kick these off as an external task (the ampersand - &)

But anyway...I need to kick off this dd command on all external hard disks found and then go into some kind of checking loop so I can check when these dd commands have finished and then carry on with the rest of my test.

As the dd command doesnt seem to give an exit status, I was thinking that I could run a ps -ef command:

ps -ef | awk '/dd/ && !/awk/ {print $2}'

and log the process id(s) for the dd commands and then when the dd commands have completed there will be NO process id.

How can I do this please within a loop?

thanks

angus

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