Well, the new power supply arrived, and works beautifully - until that is, I plug it into the LaCie Big Drive. Then the light goes out.
So... Two months out of warranty, and the drive is useless. That's a year's tv and movies. Thankfully nothing too personal that I can remember - no pictures were saved on that drive, and no music either, just lots and lots of video and every game released last year that I downloaded.
Send it back to LaCie you say! Well, sounds good, as I suspect it's a problem with the logic board / power supply within the enclosure - I defragged the drives last week and they seemed healthy enough. Just wish I'd moved the data off. Unfortunately, LaCie make a point of noting on their support site that if you return a drive to be fixed, they will wipe the drives regardless. Which makes returning it pointless.
The cheapest solution if I was that bothered I suppose would be to buy another Big Drive, take out the drives from that, and put in the ones from the old one. Which would be an obvious gamble, as there is no way of telling if it really is the unit rather than the drives as assumed.
Lesson learned? Never ever buy an external drive that has two drives striped to raid 0.
I've had a Maxtor external drive fail on me before, but nothing was lost as it was just the enclosure that went. This one? next to impossible to fix without the data being lost.