Yeah, I have (had) a bunch of hard drives (mechanical) with a similar issue: working fine one minute, completely and utterly dead the next. Turfed.

At least the SSDs have decent warranties and don't cost a fortune for RMA shipping.

The "sudden death" firmware bugs seem to have been fixed over the past couple of years, and that kind of failure should be pretty darned rare now (mid 2011).

Cheers