StarTech.com M.2 to SATA Adapter - Dual Slot - for 2.5in Drive Bay - RAID - M.2 SSD - M.2 Adapter - M.2 SSD Adapter (S322M225R) 2.5in SATA Dual M.2 (SATA) Drive

使用を勧めない。

Works as expected. 1 SATA M.2 SSD installed in the M2_1 position worked in multiple disk mode after appropriate jumper settings 2 SATA M.2 SSDs installed worked in the Spanned disk mode after appropriate jumper settings I now have a 4 TB SATA SSD.

War mein erster Kauf, leider unerfolgreich. Ich hatte diesen so bestück, dass ich zwei 1Tera NGFF-SSD's drauf hatte. Ich wollte somit einen 2Terabyte-drive haben. Beim installieren von Windows 11 ging was schief, und danach erkannte dierse Adapter nur noch einen dieser bestückten SSD's. Nacher habe ich separate single-bestückbare Adapter gekauft, aber musste leider feststellen, dass beide NGFF-SSD's auch nun fehlerhaft sind. Muss noch dazu sagen, dass die 1 Terabyte-NGFF-SSD's nicht absolut identisch waren (verschiedene Hersteller)

Be very careful of this adapter, especially if you are looking to use it as a boot device. It uses the ASMedia ASM1092R controller for the "hardware RAID" and if your BIOS can't handle it the SSD devices flutter around. IE: if you've got only one SSD installed, sometimes your BIOS will find it other times not. Or, if you need MBR and your OS doesn't write to all devices under RAID 0, JBoD, or BIG, you will have problems booting eventually, depending on which drive the BIOS hits first. Won't likely be a common issue for modern GPT/UEFI systems. Last thing: The setup is a bit fiddly if you have to use the jumpers to set the RAID mode. I don't recommend this device for that reason, just in case you loose power to the device and have to reset the adapter while its installed.

To save people the trouble and frustration I thought I'd share my experience regarding this adapter and JBOD (Just A Bunch Of Disks) mode: I was looking for a 2.5" dual M.2 drive single SATA adapter for my two identical 1 TB drives that offered JBOD to have a single enclosure in my external bay/dock setup to pop in for backups instead of having two separate 2.5" SATA enclosures. From the description I read and the research I did I thought this was possible. This one part is key though from their description: "The SSD adapter also supports non-RAID operation (JBOD) when paired with a port-multiplying SATA controller, so both drives can be used independently of one another". Remember that for later. Since I was using current (2019 and newer) external bays/docks/cases and a 2018 Mac Mini, I assumed that this port multiplying SATA controller technology would be part of it. Incorrect. When I received the adapter, I installed the M.2 drives, did the jumper settings, and popped it into my external dual USB bay. Up came one drive on the screen. Confused, I looked at Disk Utility, which also only showed one. Thinking I made a mistake with the jumper process, I tried again, same result. Thinking maybe my dual bay was incompatible somehow, I tried my external USB enclosure. Same thing. I thought I had to format the drives and do a special setup in Disk Utility. That wasn't it either. At this point I thought I had a defective unit, and started checking more carefully the reviews. A number of people mentioned the same issue; other RAID modes worked fine, but JBOD didn't for them. As a test, I configured the jumpers to RAID 1. Lo and behold, that came up fine and a short test using Carbon Copy Cloner worked. To eliminate the last possible issue being a macOS incompatibility, I connected the adapter externally to a W10 laptop with the JBOD setup. Same thing, only seeing one drive. I went to StarTech's site and did a Live Chat with a tech support rep. He was extremely knowledgeable and helpful. Explaining my situation, he clarified to me that these multiple SATA controllers exist on the unit housing the adapter itself: whether it be the internal connection of a computer, or an external docking bay or enclosure/case. As long as you have a semi recent computer, doing a direct internal install will be fine, with the computer having the proper multiple controllers. This is however not the case with the external ones, they are built with a single controller, either per case/enclosure or per slot in a docking bay. They can and only will be able to interpret one drive. While the StarTech adapter and ones like it does allow RAID setups because it essentially translates the drives into a single one the computer sees, it can't do the same to be compatible to show two separate drives. So for my situation, I will have to be returning this adapter as it doesn't serve my needs. 5 stars because technically the adapter did everything it was supposed to do, but -1 off because this explanation and clarification of JBOD and how it only works in internal setups and can't in normal external ones would and should have been added to the description. I hope this helps someone out. NOTE: If you DO want a true dual M.2 drive adapter that is JBOD compatible, StarTech does sell one in a case/enclosure form for $76 where the internals contain two SATA controllers: the StarTech Dual-Slot Hard Drive Enclosure for M.2 SATA SSDs (SM22BU31C3R): https://www.amazon.com/USB-3-1-SSD-Enclosure-Aluminum/dp/B06W9L34YC/