Installed a Crucial SSD as a second hard drive in my 2011 21.5" iMac a few months ago using the OWC kit. It's been working fine up until a week ago. Started getting the error that I had "disconnected a disk without ejecting" when waking from sleep. Random beach balls and unresponsive. Well today it crashed and wouldn't restart, so I forced it by long pressing the sleep button. When it restarted I got the flashing question mark folder. Tried to run the recovery partition, same flashing folder. Ended up restoring a time machine backup to the original hdd and formatting the ssd. My question is this, before I go tearing the thing apart again, is it possible that my ssd came unseated, or that I have a bad cable? Or is the SSD shot? Is there a way I can tell without opening the iMac again? Thanks.