TERRAMASTER D8 Hybrid HDD NVMe Enclosure 4 HDD + 4 NVMe SSD (Diskless)

UPDATED! - Terramaster has been great helping me through this issue I was having. It turns out the unit needed a firmware update. Now all seems to good now. I can't say enough about how great customer service has been with them. Original issue - Purchased in August of 2025 and was working great right of the gate. The unit now disconnects the SSD's randomly. Running on Mac Studio with latest OS version. Seems to be only the SSD's that are dropping connection. I have tried other SSD's and it does the same thing. Currently running 2 Western Digital WD_BLACK 8TB SN850X NVMe and they drop connection randomly as well. The spinning drives all stay connected, so maybe there is something wrong with the controller running the SSD portions.

Update & Regrets from my 3 week of experience: ----- 3 weeks later - I am officially returnining this, I suffered data loss on back up and source drive corruption. * Endurance copy fails very predictably. * Not compatible with - GigaStone NAS 2.5 SSD * Not 100% stable with - WD Red NAS 3.5 HDD in RAID * Not 100% stable with - Leven NVME Leven + 1 died * Not 100% stable with - Leven 2.5 SSD * All the Leven NVMEs i never had any issues from my existing Thunderbolt 3 NVMEx4 bay enclosures (StarTech) * All the SSD i tested outside I dont have issue connecting to a USB-to-SATA adapter * I lost my entire TV show archives. Pros: Quality built plastic enclosure USB 3.2 Gen 2 10Gbps - descent performance First left 2 front loading drive bays can be RAID-0 (Stripe-Set), rest of the drive bay and NVME slots are individuals. Works with 2.5" generic SSD drives. Its a simple USB-C DAS not Cloud based NAS Cons: The Front loading drive locking mechanism is weak design, anyone or a "curious cat" on your table top can be curiously eject the drive bay mechanism. During heavy transfers, the USB-C Lag can be experienced even with USB 3.2 gen 2 protocol cable, but it's very little ... in comparing to Thunderbolt storage, you get what you pay for. Summary: --------------------- --------------------- --------------------- BACK UP YOUR DATA else where!!!!! --------------------- --------------------- --------------------- I really wanted this to work, It seems to fail everytime with endurance copy/transfers in a form of backing up entire archive to/from this DAS deviced, I tried factory cable came with TerraMaster my own Active Thunderbolt 3/4 cable (worked little better but this is not the issue).

Runs 4x24TB HDDs and 4x4TB NVMe drives each running in a RAID-5 setup holding all my precious moments. Although I had a problem at first with the connectivity over USB-C, turns out the port on my server was USB-C 2.0... Switching it to a USB-A 3.2 port opened the flood gates and unleashed an unfathomable power that I can't hold. It basically says "LET 'ER RIP" and I'm now transferring at full network speed over the wire. Great device!

After a week of use, I’m cautiously optimistic. No major issues, the one issue that did pop up was perfectly handled by the device hardware and firmware allowing a quick graceful fix. Will report back later after more use, but for now I recommend it for an affordable but reliable 10Gbps enclosure with both m.2 and SATA support. Why am I optimistic? I’ve already written 16TB to it, via two sustained 48+ hour zfs send. Pretty solid stress tests, I think My configuration: Enclosure set to “Single Disk” (the default , passes through each drive) 4x 16TB WD Red SATA drives (ZFS raidz2) 4x 2TB WD Black m.2 NVME drives (ZFS mirrored pair, special for metadata and < 16kb blocks) Setup - The SATA sleds are tool-less, really nice. No major issues - m.2 was also easy once I checked the manual to see how to access the compartment (remove 2 screws, slide forward) First Boot One of the 4 SATA disks wasn’t being seen by the OS. I checked the helpful LEDs and sure enough one was not lit. Powered it all down, swapped the drive with another in a different bay. Booted up. Same issue with the same drive, different bay. So it’s the drive, not the bay. I knew the drive was functional (and had live data on it) so I swapped it back after first blowing into the connector in case there was dust or something. I also reconnected the tool-less rails, and was really deliberate when sliding in the tray of the problematic drive. Powered up - issue resolved. User error perhaps, but it’s fine now First Week I set up the ZFS pool as described above and immediately started a zfs send | zfs recv to copy an 8TB dataset to the new zpool on the DAS. Performance was as expected Roughly ~24 hours into the send process, I noticed one of the m.2 drives in the mirrored pair had fallen off the system- the OS could no longer see it. Not a good sign. It was mirrored so the pool was still up Then I noticed the drive had actually had a USB reset - so the OS immediately re-detected it, just with a new device name (sdo instead of sdl). I closed the now-stale LUKS volume, reopened it with the newly assigned device name, added the device back to the pool/cleared the error state and the copy gracefully continued, the pool was healthy. Roughly 36 hours later, the whole operation completed successfully. Then I did it all over again, no issues this time So, for now, I’ve decided it might have been a quirk with the USB controller or OS. It might have been some other issue, but I’m not too worried. I haven’t been able to reproduce the issue, and it was handled gracefully by the OS, by ZFS and by the DAS. Everything worked correctly through a spurious failure So, I’m happy. I deducted one star only because of the two quirks described above, even though neither were provably the fault of the device. If it runs for 6-12 months, I’ll add the 5th star Can’t beat the price, the forums are very active with vendor reps and it seems they take support very seriously and provide firmware updates for both “bugs” as well as configuration changes (to disable power saving features if desired, I think, is one example I saw) Value for money: Can’t best this price.

Read the specifications carefully. Only drives in bays 1 and 2 are eligible for hardware RAID. You can't create a hardware RAID 5 array with the 4 physical hard drives. When I try to use TrueNAS to set up Software RAID on the 4 drives, it tells me that I have a duplicate serial numbers on my drives and it won't set up the array properly. I've flashed the firmware on the unit and TrueNAS still won't recognize the 4 drives so this is useless for my purposes.

Works with OpenMedia Vault, and Windows 11. Haven’t used NVMe sockets, but 3.5” drives work well. I like the tool less drive caddys. Would be nice if they locked in…

I used it as a drive bay for a home built NAS, haven't used the built in raid or the NVME slots yet but it was quick to set up and the NAS discovered the drives right away. So far it has worked perfectly.

This is an updated review: This product is 100% trash. Every time you turn off the computer and turn it back on, this will fail to connect. I have to pull all 4 of the drive bays, unplug usb, replug, let the nvme populate in windows, then plug each drive bay in one at a time to get those bays to come online. If you simply try and connect any other way the unit will continuously connect and disconnect. I am not inclined to believe that my unit is simply defective because it works otherwise. I also have a 12 bay NAS from these people and that thing is worthless as anything more than a file share. It doesn't even have the drives shown in the correct slots in the configuration page which, if you didn't know this, could lead to data loss from you erasing the wrong drive. I have concluded that this brand simply cannot get it together and is not sufficient for data storage. I use this as a game drive and swap drive so I kept it. Since you have to pull the drives all the time I would NEVER try to use the raid function on this pile. Put your money into some other brand.

So far so good. Hard drives can be removed easily and there are no issues accessing data when used in a different enclosure or computer. I like that I can have the first 2 disks in raid1 and the other disks are setup as single disks. Very good product! Excellent customer service! Highly recommended!

Product was as described. All parts were there. Only has a type c - type c cable and power cable inside

If you are trying to build a homelab style NAS - do not try to use USB disk enclosures, it will not work. No SMART passthrough. Disk serial numbers do not get passed to the OS correctly, disks are not detected with TrueNAS Core. When virtualized and passed as QEMU SCSI disks the speed is very slow and transfers break all the time. Seemingly works well enough in windows. Have not tried any of the RAID modes.

Build quality is cheap and feels flimsy I paid $500 AU for this I did not feel like I had $500 worth in my hands. The D8 is quite loud and is rattling I have pulled out the drives mounted and unmounted into the casing with the same results the operation I was running on the drive was a butterfly test using HDD scan. The drive is in good condition tested previously.

Not a lot of bells and whistles but enough features to do what it's supposed to do, and you can always add on tweaks with software.