[Machster]

G5 dual 2Ghz (OS X 10.4.7) copying from stock HD (160GB) to WD Raptor 150GB.

1st attempt: SD stalled, would not quit, and froze OS. Reboot OK but Disc Utility could not find HD's. Reboot again.
2nd attempt: SD stalled (elapsed time: 1.5 hours)but copied more. Ran lsof with last 2 lines reading:
SDCopy 704 root 22r VREG 14,5 19405824 13509351 /Users/Shared/earthbrowser2.db
SDCopy 704 root 23u VREG stat(/Volumes/Raptor/Users/Shared/earthbrowser2.db): Operation timed out

Advice?
[Edit: SD will not quit or force quit yet again on the above 2nd attempt. Other applications failing to respond as well. Need to reboot again!]