MAIWO 4 Bay RAID Enclosure for 3.5 inch SATA Hard Drive with Two Fans, Support UASP 4K HDTV, 64TB USB3.1 Type-C 5Gbps Speed, RAID 0/1/3/5/10 Clone Large Normal

Pros: Well documented
Solid metal construction
Works as expected
High throughput in RAID 10

Cons: None

Overall Review: I put 4 16tb Ironwolf Pro NAS drives in this and configured it for RAID 10. This created a 32tb redundant array which when formatted ext4 came out just over 29tb. It worked immediately.

The enclosure is about as small as it could be, all metal, and it has two fans with a slide switch to choose high speed, low speed, or off. At low speed my drives seem cool enough and the fans are not audible.

The power is controlled by a simple slide switch which means it will power back up if it was on when power failed. A 12V external brick is included.

RAID mode is selected using dipswitches, the settings are documented in English and Chinese. It makes sense. Be sure you read and do the part about resetting the unit after selecting RAID mode.

I'm using this array with Channels DVR software on Kubuntu. I can record 6 simultaneous video streams with very low CPU utilization and zero dropped frames. It has slightly exceeded my expectations. I'd buy this again.

Pros: Really, there isn't much to say about this product that is positive. The small form factor would have been good to have and the lower power requirements of the chassis overall would have been nice.

Cons: The raid on this device isn't functional at all. It really doesn't matter what setting you choose. Nothing works. Even raid off doesn't work. On Linux, trying to use software raid with this leads to serious performance issues which appear to be due to the controller interfering with the kernel's raid drivers.

Overall Review: This would have been really great to use as a file store connected via usb3 to a mini pc, but this chassis just doesn't work.