Boot drive (Plextor M5P SSD 128Gb) disappears at boot

[sherpa25]

Many times, my boot drive disappears from the BIOS, and hence prevents the PC from booting to Windows.  It is not regular but I can't find a pattern when it would happen.  They're attached to the Intel ports, and even tried moving them to other ports and swapping cables, sometimes its fine, sometimes they don't appear.  I can't use the Marvell ports since I got this board for the eSATA ports, w/c share w/ the internal SATA ports.

Currently at the latest F7, but it happened since the I got the board w/ F5. 

[ysw]

which motherboard?
have u installed drivers from gigabyte website?
irst driver on gigabyte website is ver12.6.
do ur boot drive disappear on cold boot (power on)? if you power on 10 times, ur boot drive disappears ? time?
how about reboot the system, is ur boot drive detected?

[dredge3]

I have same problem.
Which drivers?
restart does the trick

[danidemi]

Same problem with different ssd. In my case I'm almost sure that the SSD disappear after I leave the PC turned off for around 10 / 12 hours.
Indeed, it always happens to me in the morning, after turning off the PC at night.