Hi,
I have a Windows Hyper-V core server running several VM's. One of them is a NAS with OpenMediaVault (the only NAS OS I managed to get to work with Hyper-v). It was fine until this morning, I was unable to access the NAS any longer. After logging in using Hyper-v management I noticed alot of errors. I shutdown the NAS, tried to boot it again and it said it was missing a SCSI device. I "remote desktop'd" into the Hyper-v host and checked diskpart. The disk did not show up there either, so I assumed it may have died on me.
I took out both HDD's and connected them to my own computer, both show up in Windows. I tested both SATA cables and both are working fine.
The only thing I did not test is the 1x molex to 2x sata power cable.
Could it be one of the SATA ports on the motherboard that died somehow?