SD *seems* to hang while copying to external disk

[NotoriousBIC]

I'm trying to create a bootable clone on a LaCie firewire disk and I'm running into a bit of trouble.

Everything starts out normal, but eventually SuperDuper stays in the same place for hours. It remains responsive and I'm able to stop the copying process, so a 'hang' is perhaps not correctly worded.


This a pic of my third attempt at this, which is still at the same spot after 3 hours. Something I've noticed is that it stops at more or less the same spot, but not exactly.

Steps I've undertaken:
- Checked for any large files on source disk (none present THAT large)
- Repaired Disk Permissions
- Verified all Disks (no problems found)
- Updated SD (latest auto-update)
- Partitioned the firewire disk with a smaller partition

System info:
XServe RAID
Mac OS X Server 10.4.6
Source Disk: RAID Mirror set, 2 x 180 IBM
File System: HFS+
Destination Disk: LaCie External Firewire 500 GB

I must confess that I'm not too familiar with Mac OS, so forgive me if I made an obvious mistake.
Thank you very much in advance for any help you can offer.