Yeah, that's basically it.

Except don't mget /dev/hd* (it'll transfer everything twice!),
but rather: mget /dev/hda /dev/hdc

It will be slow, about 0.5Mbytes/sec up to maybe 0.7Mbytes/sec, and it will transfer the entire hard disk(s), not just the parts that actually have files on them.

So for a single 30GB drive, this will take around 60000 seconds, or 1000 minutes, or 16-17 hours, to complete. Each time.

Cheers