Break down of ac power source made bad sectors?

[beLIEve]

Personally, I’ve came across it, so I’d say yes. But it doesn’t happen all the time, perhaps only under certain conditions (perhaps when it’s writing to the hard disk, or possibly even reading from it).

Here’s also a couple of reports I found reporting the same thing :

http://forums.anandtech.com/showthread.php?t=2107320

http://forums.guru3d.com/showthread.php?t=353380