I've started to notice problems when attempting to transfer files to that drive. Anything from lockups, non responsiveness, having to kill whatever I'm trying to do.
I've run some tests with hdtunepro and taken screenshots. If anyone could help make sense of the data? Looks like the drive is on the way out? It's outside the warranty, so I guess I'll be taking the data off and replacing it.
Pics of the tests here;