Part of what makes the Buffalo MiniStation Thunderbolt unique is the inclusion of USB 3.0 alongside, well, Thunderbolt. Going with a Thunderbolt only drive is admittedly a difficult prospect to swallow - what happens if your only Thunderbolt-packing computer dies, for example, and you need files on the drive? Having legacy interfaces is just something everyone has grown accustomed to, and what that usually ends up meaning is that USB needs to be onboard.

Buffalo told me that they worked with Intel and Apple to develop a switching system for deciding which controller to switch SATA from the drive to, and that this system is unique to the MiniStation Thunderbolt for now. To find out more, I had to open up the drive. To be honest, well, I was always going to open the enclosure…

I wager a lot of other potential customers are interested in putting an SSD inside the MiniStation Thunderbolt and taking advantage of the interface’s basically native transfer speeds. Unfortunately, getting the MiniStation apart is somewhat challenging. Disassembly starts by prying the top plastic cover off, which is connected via plastic clips to the drive tray, which is in turn adhered to the aluminum base with some sticky double sided foam tape.

I ended up having to apply a lot of force to separate things, and for me the adhesive was what gave first while prying on the top part of the drive. Armed with this knowledge, people trying to take apart the drive assembly should probably heat the underside with a heat gun before prying the top off with a plastic opening tool. After this comes up, there are plastic clips and a few screws in your way securing the drive to a plastic cage. It’s clear the black part sits in the aluminum tray, and the top white plastic part snaps over this.

With this apart, you can separate the PCB which runs under the 2.5" HDD inside the drive. In the case of my 500 GB model, the drive is a SATA 3.0, 5400 RPM, 8 MB cache, Samsung ST500LM012. I’m not sure what the 1 TB model uses since I wasn’t sampled one, but likely the same family.

The board runs almost the full length of the HDD underside, and there’s a fair number of packages onboard. On the topside we can find the Intel DSL2210 (codename: Port Ridge) endpoint Thunderbolt controller, which is a single Thunderbolt channel, 2 PCIe device with 0.7W TDP. Port Ridge is popping up in a lot of places, for good reason - it’s inexpensive, second generation, small, and has a low TDP. What it sacrifices is pass through functionality or additional Thunderbolt channels.

At center, below the DSL2210 is an ASmedia AS1061 PCIe-1x to SATA 3.0 controller. This is clearly the controller used when the MiniStation is connected over Thunderbolt. Again, Thunderbolt basically tunnels either PCIe or DisplayPort, you need a fully fledged PCIe controller on the other side for whatever you’re connecting to.


At top left under the USB 3.0 controller is a MediaLogic MDLU03 USB 3.0 to SATA 3.0 controller, which obviously gets used when the drive is connected over USB. On this side of the board there are a few other things, like a step-down converter for Thunderbolt power, a tiny 512 Kbit flash, and three white LEDs (with pads for two more) at the bottom.

So you’re probably wondering, well, how does the device switch between the MediaLogic USB 3.0 controller and the ASmedia controller? The answer is on the other side of the PCB.

Here on the back side of the PCB there’s both an ASmedia ASM1456 SATA 3.0, 2 to 1 multiplexer/switch, and an NXP LPC1114F (PDF) microcontroller with an up to 50 MHz ARM Cortex M0 at its core. This controller undoubtably contains the management and logic which tells the switch which SATA controller to choose between. There’s also something a little bit ironic about Intel having to recommend use of an ARM Cortex M0 controller for its platform for Apple and Buffalo - it seems like making a next generation Thunderbolt controller with a tiny controller or AP of its own onboard would make a lot of sense.

There’s a ton of integration here to do what seems like a simple task, but the end result is a drive which will connect and switch between USB 3.0 and Thunderbolt and handle the edge case where someone decides to connect both at the same time. The only real next level is for future Thunerbolt controllers to offer some onboard AP purely for devices like this with multiple I/O. Maybe we’ll get a third generation Thunderbolt SKU with SATA built in, that would seem logical.

After I ran performance numbers and testing on the MiniStation with HDD inside, I disassembled the MiniStation and tossed in an OCZ Vertex 3 MAX IOPS, which works perfectly. Getting the MiniStation back together is a bit of a challenge, but not impossible - I just don’t want to do it again, and with those plastic clips and adhesive would only recommend disassembly and reassembly once. That’s the tradeoff which gets made for having a drive with no external screws.

Introduction and Physical Impressions Performance - HDD and SSD
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  • lin2log - Thursday, August 2, 2012 - link

    Which part of: "Don't get it? Don't need it? Then don't BUY it." is confusing you exactly?
  • AnnonymousCoward - Thursday, August 2, 2012 - link

    lin2log, you're nothing but nonsense.

    500GB USB3 external drives are $70. Yet somehow, $200 is an affordable price point. What a joke.
  • Dman23 - Wednesday, August 1, 2012 - link

    I've been waiting for an affordable external SSD from Buffalo. This is great!! Faster thunderbolt speed, with the option to go USB 3, at an affordable price. Excellent!!!
  • Sm0kes - Thursday, August 2, 2012 - link

    Ummm.... this doesn't offer an SSD as an option.
  • philipma1957 - Wednesday, August 1, 2012 - link

    Lets see t-bolt can do about 800 mbs read write. so you put in a hdd that does about 100 mbs read write why? last month crucial was selling 512gb ssds for under 375. Why not drop a big ssd in this .

    Then sell it for 550- 600 and call it a day?
  • Jaybus - Thursday, August 2, 2012 - link

    Because the previous gen MB Pros do not have a USB 3.0 port. TB is overkill for a hard drive, but the only other option for last gen MB Pro owners is USB 2.0 which drastically slows down even the hard drive.
  • sicofante - Thursday, August 2, 2012 - link

    So let's make this clear once and for all:

    If you buy one of those Apple computers that refrain from using the standard USB 3.0 ports, you are forced into a very expensive standard that won't give you anything extra except when:

    a) The peripheral is capable of extremely high speed transfer rates (>5 Gbps that is offered by USB 3.0)

    b) The peripheral can be hooked to a chain of TB devices (i.e. has TB passthrough).

    Buffalo fails to make it in both cases.

    You buy expensive Apple hardware? You've been properly punished by not being allowed to use USB 3.0 peripherals and forced to use an overkill (for the purpose) ultra-expensive technology instead.

    You didn't fall into Apple's trap? Nothing to see here. Move on.
  • KitsuneKnight - Thursday, August 2, 2012 - link

    All Thunderbolt devices can be hooked to a chain. Some can be in the middle (ones with passthrough) and others have to be at the end (like this one).

    Your post comes off as incredibly angry and bitter... why? "properly punished"?
  • Impulses - Wednesday, August 1, 2012 - link

    Yeah, the only way this product makes any sense is if they sell it with an SSD to begin with... There's no tangible benefit to the huge TB price premium compared to cheap USB 3.0 HDD.
  • philipma1957 - Wednesday, August 1, 2012 - link

    I use a lacie little big disk with 2 ssds in it. an easy mod. I put in 2x 256gb samsung ssds. I use it as an external boot drive for a mac mini and the internal slow 500gb oem is my backup easy peasy. 4 screws and the case is open.

    I don't understand the use of a slow drive like the one in this case.

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