Two laptop drives busted in two weeks!!!!!!! I thought that since the drive never got hot, it wasn't spinning up when not in use (unlike 3.5" drives, which get hot even if they're plugged in and idle). So when the enclosure dropped from a 1.5' high table, I hoped it would be all right. But no go - it makes these wack-wack-wack-chack-chack-chack noises and the system doesn't detect anything.
I will never, EVER use those cheapo $10 aluminium drive un-protected drive enclosures. They suck. Suck. Suck! SUCK!!!! They're evil. EVIL!!!! Gotta get me something with silicone rubber shielding of something more substantial to protect the drive against bumps.