Tearing my hair out for about a month with this. Gigabyte mobo, win10 upgrade from win8. SATA WD 1TB drive (tho has happened with other SATA). Last time around, I got a win10 install restored to a 1TB SATA just fine [using win7 backup/restore! from a win10 install using an IDE drive]. Used it for about 5 days, then bang! reboot, and no SATA drive appears, even on Windows recovery disk, no sda. The BIOS just hangs at "AHCI drive init....." and eventually times out - no SATA drive to be found. When I boot knoppix, I can see the drive, and even mount it, warned by Knoppix to add "-o remove_hiberfile" Then I see the drive and all files - but still not there when I boot win10. This has happened twice at least. Happened with TWO Gbyte mobos, which BLOWs my mind [updated all drivers on GA-78LMT. This is a GA-880GM-UD2H] What am I doing to cause this?? And how do I fix this! A month of googling with lots of hints, but no clear answers. I even when thru the BCDboot/bcdedit etc stuff on winrecovery - don't want to venture there again until I undertand this.
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Second time I booted Knoppix, it could NOT find the drive. Win10 still stalls at BIOS AHCI drive init.... I could believe a bad disk drive/SATA chip, but this has happened with two mobos, two SATA drives. I have swapped power supply/SATA cables. Nothing left. Same AMD Athlon, but surely not?– user322035Nov 26, 2015 at 20:36
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Tried gparted live CD, still no sda. Booted again, defaulted BIOS, it asked me to set SATA as AHCI... OK. This time it booted windows OK. The only thing I ever changed in the BIOS was to get it to boot USB CDROM first. Hmmm.... something fishy about BIOS. Dare I try repeating this?– user322035Nov 26, 2015 at 20:51
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