It sure seems like it, but I don't know why. It almost seems like you got extremely unlucky, because I have an external enclosure which I use for the same thing, and plugging it in when the computer is running has not been a problem for me. My enclosure does differ from yours in that it has it's own wall wart, but still the only problem that I have is that it is not recognized because I don't have a built in e-sata port on my mobo. I suppose that maybe the drive got more inrush current than it should have. Do any of the parts on the bottom look blown?