mac mini mid 2010 hard disk keeps ejecting itself
My mac mini is set up with two sata disks installed, one is a 128 ssd and the other a 1tb hdd. Since installing mountain lion, the hdd keeps ejecting itself, and i get a message saying - this hard disk was not properly ejected. then i wont find the disk in finder, or disk utility!. I then have to remove the hdd from the mac mini and plug it into a usb caddy, which finds it no problem, and then when i put it back in the mac mini, it works again!! so the disk is not faulty i dont think. It then works for a period as random as a few hours, to a few weeks and then i will randomly get the "this disk was not ejected properly" message and it has again dissapeared. I use the mac mini as a media centre and it isnt really being pushed hard when the failure happens.
Anyone have any ideas as to whats wrong?
Mac mini, OS X Mountain Lion (10.8.2), 128GB SSD, 1TB HDD, 4GB Ram