StarTech.com Dual-Bay USB 3.0 / eSATA to SATA Hard Drive Docking Station, External 2.5/3.5" SATA I/II/III, SSD/HDD Docking Station, Hot-Swap Hard Drive Bays, Top-Loading (SDOCK2U33EB),Black

I have this device connected via eSATA to a SATA card plugged into the PC motherboard. That card is a dual port eSATA card and it does support port multiplier, because of this Win11 on my PC does in fact see both drives. This is a good configuration for me. This device is an excellent match with the eSATA/SATA card I am using which is PEXESAT3221. Of course it is for a PCIe motherboard slot. If you are thinking of doing this make sure you have an open PCIe slot on your motherboard and if so get both. They will work perfectly and in this configuration they support RAID zero, which is what I was looking for. I hope this helps you.

I have several already but they are SATA II This one is III. That is double the Data Transfer Speed from 300 to 600 MB/s. Loving it, have Installed, Booted and ran several Linux Distros from an 2.5 SSD and runs af it were running directly from the onboard mboard SATA ports.copy data between drives. To install, test or run newer Linux Distros temporarily and not disturb the m.2 internal permanent distros, like Manjaro,OpenSuse, Fedora, Debian and ArchLinux based-like distros. I wish I had bought this one before the pandemic, price has increased but still worth it. I take SATA over USB hands down.

Quite surprised so many negative reviews. Not my experience, possibly due to other hardware or software differences.I purchased the StarTech.com USB 3.0 / eSATA Dual 2.5/3.5" SATA HDD Dock with UASP, part # SDOCK2U33EB. NOTE: two drive, not 4 drive capacity. As the name states, I use both 2.5' (SSDs) and 3.5"spinning drives with it. The Amazon purchase was in March 2015, perhaps updated from earlier. I've used the dock intermittently for 7 months.I ran Windows 8.1 Pro when purchased and Windows 10 Pro now. I use a tablet as a desktop (Microsoft Surface Pro 3, normally on the Surface Pro 3 dock station for its added USB, Ethernet, DisplayPort connections). So I'm using Windows, a purchased, not home made device, with USB version 3 connections, full power, no battery. That eliminates many who had (IMO: a self-inflicted) complaints.Next, I do not leave the dock connected and on all the time. It is simply an offline backup method so why leave it on risking possible (never happened yet) malware or virus. Offline is safer.As I started pen this, I completed a 50GB copy from my internal SSD to a slower SATA 3 Gb/s spinner, I'm now copying another folder 33GB in size. Done long ago. I see transfer speeds of 15 to 86 Mbps. Windows Explorer fully reported removal of a SSD (press down on left side ejector) then insertion of a 3.5" spinner. No freezes. No need to reboot etc.I do not award full 5 stars. The industry is awash with its SATA 1, SATA II, eSATA, PCIe, NVMe protocols with unrealistic speed ratings fully not relevant but repeated by manufacturers without a heads up to the uninformed consumer. They could do better. I have purchased and returned a competitors dock that did not transfer at USB 2 speeds so yes, this is better than other HDD docks.

I had high hopes for enjoying this unit after conducting a lot of research on such eSATA/USB hard-drive docking adapters. This one has an eSATA port on the back as well as a USB 3.0 port. However, it's got one FATAL FLAW: If the unit ever loses power for whatever reason--and this includes a momentary power flicker, such as can occur during a storm--then the unit will turn off and won't power back on by itself. This is because the StarTech engineers, in their infinite wisdom, decided to use a soft power switch on this unit--a switch that interacts with firmware and one that defaults to the "off" position. Thus, the only way to get the unit back on it to have someone press the power button. Yes, you read that right.So here's what can happen: You add this docking device to your machine and then you use remote desktop, TeamViewer, LogMeIn, etc., to access your machine while you are physically away from it. Then there is a loss of power to the remote machine. When power returns, your computer and all of your peripherals come back on (most modern computer BIOSes let you configure the computer to turn on after a power loss or to restore the power state of the computer before power was lost)--yet your external StarTech dock will not come back on. And because you're working remotely, there is absolutely no way you're going to be able to get power back on unless you have someone visit your home/office and press the power button. If the hard drive(s) attached to the StarTech docking device have data that you need to access, you're simply going to be out of luck until someone can physically walk up to the StarTech docking device and press its power button...As far as I'm concerned, this is a huge deal-breaker. Not only that, but a rep from StarTech wrote to me and explained that as far as he knows, ALL StarTech docks operate the same way. So he said that there is no alternative within the StarTech product line for anyone who wants to retain or restore power between power cycles. (To his credit, he apologized for any inconvenience this design decision has caused...)Now I realize that I can hook-up the unit to a UPS, but power outages in my area can last for hours. Furthermore, I see no reason why the product engineers couldn't have offered a hard power button that you physically flip to an on or off position so that when you turn the unit on it stays on and returns to the "on" state should power ever be lost. I can't think of any good reason why a device such as this would employ a soft power switch that defaults to the "off" position.If power loss isn't a risk factor for you, then the unit does what it was designed to do--and for that reason I gave it 2 stars versus 1 star. And despite the fact that I am extremely disappointed in StarTech, the company website does offer a 24-hour chat feature. While I'm sure they would assist when possible, in my case all they could do is offer apologies and reassurances that they would pass along my observations to the products team.