I've just experienced a completely RANDOM failure of my solid state drive, one morning it just wasn't detected by the BIOS. Fortunately I've rectified the problem but I thought that the solution needed to be shared and discussed:

1) From a POWERED off state, disconnect the DATA LEAD to the drive in question leaving the power lead plugged in.
2) Turn on the computer and wait for the POST to complete.
3) Without turning off the computer plug the data lead back in.
4) Press the reset button. The drive should now be detected.


I hope this helps other people but why did this happen and how did that fix it?If it was anything other than an SSD, I would suggest that the device was taking longer to COME ready than the bios is allowing. I would expect the SSD to come up ready as soon as power is applied.  Instead of putting the data cable on after the drive is powered up which could cause data corruption. It would be better to diagnose what is causing this. To help with this please post the make and model of motherboard. What sata ports your drives are attached to and what devices you have attached. The make and model of SSD and the ssd firmware version. The program speccy will report all that.