Hi, I'be got a Late 2011 MBP with a Cruclal M4 SSD that was purchased at the same time. Recently, in the past few weeks, I've noticed that OS X seems to be randomly hangings with beachball (particularly since I installed 10.9 GM). The MacBook itself goes through some wear, I do minor building with Xcode, but not much. Last night, I did a disk integrity check, it failed - tried within recovery, and it failed again. So I wiped the drive and reinstalled Lion, then upgraded to the GM again. So far, there have been a few random hangs with beachball since the reinstall. Do you think the drive is dying? Worth noting that I've already got my data backed up and a Samsung 840 Pro coming tomorrow.