Hy,
I'm using german W8.1 RTM, 1 Samsung SSD 840PRO, Sata configured as RAID for further use with 2 additional WD drives, i7-4770, newest drivers from downloadcenter.
Reproducable: Install W8.1 from USB stick 64 bit gpt-drive, uefi boot. Reboot, Change BIOS to Fast Boot enabled, W8.1 comes with automatic repair preparation, endless. Reset, Change Bios Fast Boot disabled again. ... no boot device availiable....
I tried refresh System, rebuildbcd , chkdsk, many more from within the 8.1 recovery Options (Booting from stick) nothing helped. The data seems to be fine on the SSD, but no boot possible.
Any help is appreciated
Fritz