I have a LaCie Big Disc Extreme that has failed. The drive indicator flashes continuously, and the disk utility can not see it. I have tried FW800 and USB to no avail. Here's the problem: it is a 500 GB drive, but when I opened it, I found that it is actually 2 250 GB drives with an ATA interface. Is anyone familiar enough with these drives to know how they are formatted, and how to recover the data? I am running an early 2009 Mac Pro 8x2.26GHz. Thanks in advance.