Macbook Pro not finding internal SSD
After waking my Macbook Pro from sleep, it was incredibly sluggish to get going. Decided to restart it. Upon reboot, I get the image of a folder with a question mark on it. Convinced myself that I had corrupted my SSD, I stuck in my old Snow leopard boot disk and ran disk utility. Couldn't find it so took it out and stuck it in my external enclosure. Mac picked it up straight away and I was able to boot into it from my external enclosure.
I've had HDD failures before, they're easy to recover from - however this seems slighly more severe. Any ideas as to what it could be? Has my SATA cable somehow broken?
About my Macbook Pro:
late 2009 13" 2.26GHz
8GB DDR3 RAM
120GB OCZ Agility 3 SSD
OS: Mountain Lion.
MacBook Pro, OS X Mountain Lion