Removed SSD, now I put it back and it's invisible!?

[qbaser]

I took an SSD from my older Mac Pro, connected it to my new Mac Pro and the drive was 'not present' in the new machines BIOS or Mountain Lion.

But I'm not panicking as I put the SSD back into its old Mac Pro, and now it also does not show anywhere!?

I'm panicking now as I have a studio session later.

Please can someone help.

Thanks
Al

 

[Kaveman]

Hmm, sounds like its either not installed correctly or has been damaged due to handling.

This is really a hardware problem now, take it to an AppleCare Service Centre near you.