I experienced 3 LaCie hard drives with firewire->IDE interfaces exploded cause of powerline on firewire 6 ports. This 3 drives were exploded on 1 year.
" I have 26 LaCie hard drives on my work"
Then I bought what you're searching forhttp://kramer-us.com/indexes/item.asp?name=PT-1FW
I'm using this little boxe, and dont have anymore Firewire problems
One other solution would be to use 4-pin powerless cables (like a laptop has) and external power supplies.
Matt Sealey, Genesi USA Inc.
Product Development Analyst