Hopefully this is just something I did wrong, but I ended up wiping another hard drive on my machine.

I had one disk fail on and old headless B&W g3, it contains 2 disks, 20GB which has the system on it and an 80GB drive for data which died. Diskwarrior qwouldn't even see the volum and in disk utility it was shown as disk1s10.

I attached a firewrie drive with one empty 80GB partition and used ssh to remotely log into the machine. I had already copied ddrescue into my home folder on the drive. So I tried this command first:
sudo ./ddrescue -v /dev/disk1s10 /Volumes/Video/Biggy.dmg Biggy.dmg

Video is the name of the empty firewire disk and Biggy was the hard disk which failed. After running that it seemed to start and then paused. It then quit with an error message telling me it couldn't write the log file. A quick ls showed me the directory I was in was empty. I tried to access the drive remotely and could see directories disapearing as I moved around folders. In the end I was left with just the system files.

I tried again, this time saving the log file onto the firweire disk. It seemed to go a little further and then I lost alll contact with the machine, it had crashed completely. This may have been due to the missing files or the system files where deleted as well.

Im not going to be able to check until I can get a monitor to boot the machine adn try using disk warrior to repair the system disk. I'll try a recover tool to get the files I've lost off the system disk. I think I'll have to do that first and then reinstall the system.

If anyone can see what I did wrong then please let me know, if not then please beware this application in case it caused the deletion. I think I'll completely give up on two drives in a rev 1 B7W G3.