Two 3.5" drive enclosure, single eSATA/USB3 port, drives addressable individually

The title pretty much says it all. I'm after a single drive enclosure that takes two 3.5" desktop hard drives, offers a single USB3/eSata interface, but lets me address the drives individually.

The reason is i'm considering using the new Windows 8.1 ReFS and Storage Spaces to provide what's effectively software RAID to enhance the reliability of my backups. More info here. I'm seeing some SMART errors and I'm trying to avoid bit rot.

Edit - also open to enclosures that hold two 4TB drives in RAID1.

http://www.amazon.com …s=RAID+external​+enclosure

This might work.

That looks pretty good! There's this one too which I found after your link helped me work out search terms.

I guess the other option is using something with built in RAID 1, but I suspect the new ReFS/Storage spaces has other advantages and might be worth using.

I have the Vantrec FW800 model and I like it a lot. Didn't have USB3 when I got mine. Used solely for my Time Machine backups now but I have had zero issues with it.

The Vantec is what I plan to buy, to run in RAID1 with two 4TB drives... just have to convince myself it's worth all that money to buy the enclosure and drives!