Well I have made some progress thanks to IainNIX…
After installing the Intel ‘Rapid Storage Technology’ for my CPU/Mobo The drives have moved from the ‘other devices’ section of the Device Manager into the ‘Disk Drives’ section where they should be but they are lised as ‘unknown device’ instead of the WD serial number…
(only 1 drive was plugged in at the time of this screen grab)
The drive also now appears in ‘Disk Management’ but when I try to initialise it, if I select GPT I get the error “The specified disk is not convertible because the size is less than the minimum size required for GPT disks” and if I select MBR I get the error “Incorrect Function”.
The drive is still listed in UEFI as 0.0Gb.
I tried ASRocks 3TB+ unlocker utility (I have an ASRock X79 Extreme9 2011 Mobo) but it hasn’t seemed to have made any difference.
The problem seems to be my PC recognises the drives, but thinks they are 0Gb instead of 4TB
Both drives are showing the same symptoms so again I am confident I haven’t got dead drives, it really feels like a software issue…
Thanks again for the help so far!
