I assume it's just an unsupported feature, but since it seems to be software-based and not hardware-based, there should be a workaround. Right now the drives do reuse drive letters, so I assigned them permanent drive letters to make sure there was no overlap and that made no difference. drivers or updates or some sort of workaround. I was wondering if anyone had any tips on how I might get Windows 7 to recognize both drives - i.e. At first I figured it was a hardware limitation (not supported by my chipset) and I just used USB most of the time, unless I had large files to transfer, but when I installed Ubuntu 11.04b2 over the weekend, it happily detected and mounted both drives via eSATA, so it's obviously not a hardware issue. If I pop the slot 1 HDD out and rescan the disks, it picks up the slot 2 HDD just fine.

But when I try to use eSATA, only one drive shows up. It supports USB and eSATA and USB of course works fine, because it has built in port replication/multiplication. So I have the Thermaltake BlacX Duet, a dual HDD docking bay.

Thermaltake st0005u driver windows 10