A good while ago, I bought an external HDD with two FireWire ports. It was a FireWire HDD.
Note that this HDD also had an external power jack. For what reason, I'm not sure; the FireWire cables were perfectly capable of powering it on their own. Anyway, I originally thought it was necessary to use this jack, and I left it plugged in to the wall overnight.
I woke up and the HDD did not work. I took the HDD out of the enclosure, and put it in a different computer (via SATA). It still did not work.
I tested the enclosure with a known-working second HDD. That HDD also did not work, so I took it out of the enclosure and tested it with my known-working SATA-to-miniUSB adapter. No dice.
So this enclosure fried my only two 2.5" HDDs. Lovely.
Anyway, I've been listening to a lot of Tally Hall recently. They're a very good band.