I opted for these Startech HSB4SATSASBA's and couldn't be happier:
Buy the STARTECH HSB4SATSASBA 4 Bay Hot Swap Mobile Rack Backplane ( HSB4SATSASBA ) online - PBTech.co.nz
Firstly they are reporting my 4TB HGST drives as bring SAS III so I know they can at least be identified that way, I do not know however if the physical interface within is SAS2 only and can only report the speed reported under crystal diskmarks first test on the drives as individual JBOD's which was just over 198MB's.
And as a bonus they look good and feel solid.
Buy the STARTECH HSB4SATSASBA 4 Bay Hot Swap Mobile Rack Backplane ( HSB4SATSASBA ) online - PBTech.co.nz
Firstly they are reporting my 4TB HGST drives as bring SAS III so I know they can at least be identified that way, I do not know however if the physical interface within is SAS2 only and can only report the speed reported under crystal diskmarks first test on the drives as individual JBOD's which was just over 198MB's.
And as a bonus they look good and feel solid.