I have the same drive, got in Nov. 2010 and it failed July 2011. I noticed a horid lag before I shut of my computer, came back hours later to find that it was hung on the log-off screen. Upon doing a hard reset, it took 15 minutes to boot and when logging in, i could not access drives or desktop, only firefox. Upon removing the drive, the system actually seemed to perform/boot faster. I do believe this drive was slowly dying and slowing the system down as it happened.