Jerry from WI wrote:
I am backing up via firewire to a la cie 1 tb with plenty of room.
Something is really wrong. Stop the backup.
Run a verify on the main disk and the LaCie drive.
Copy a file just using finder and time it.. if it is extremely slow, there is some communications trouble.. if it is fast and TM continues to be slow then there is a TM issue.. go through the other suggestions in troubleshooting guide.