Question 1

The listing repeatedly says this is 3.2, but the housing has 3.1 printed on it.  Is this a 3.1 or 3.2?

Accepted Answer

Short Answer:  USB 3.1 Gen 2 (listed in the technical specs of the "product description") has the same bandwidth (10 Gbps) as USB 3.2 Gen 2 (listed in the adds title).  The computer industry changed the naming convention.

Long Answer: I was confused by this as well.  If my quick research is correct apparently there is something called USB-IF (Universal Serial Bus Implementers Forum) that is causing a ton of confusion because they keep redoing the naming convention as technology changes (whoever keeps changing the convention should be fired for how much confusion they have caused).  Anyway a USB 3.0, USB 3.1 Gen 1, USB 3.2 Gen1 or SuperSpeed USB port all have a max speed rating of 5 Gbps.  Similarly, a USB 3.1 Gen2, USB 3.2 Gen2 or SuperSpeed USB 10Gbps port all have a max speed rating of 10Gbps.  And just to finish the ratings, a USB 3.2 Gen 2x2 or SuperSpeed USB 20Gbps port both have a max speed rating of 20Gbps. So, basically, regardless of whether they call the port 3.0, 3.1 or 3.2, if they call it Gen 1 it is 5Gbps, if they call it Gen 2 it is 10Gbps, and if they call it Gen 2x2 it is 20Gbps.  If you look at the technical specs in the "Product Description" section it states that it is USB 3.1 Gen 2, which has the same 10 Gbps speed rating as the USB 3.2 Gen 2 which is listed in the title.  So, although confusing, the add is technically not contradicting itself.  That is, as long as the USB 3.1 printed on the device is meant to be USB 3.1 Gen 2 (10 Gbps) and NOT USB 3.1 Gen 1 (5 Gbps).  Clear as mud, right!

Question 2

Can anyone verify it will work with a Raspberry Pi 4 as a boot drive?

Accepted Answer

I cannot verify it will work. But given it uses the same JMS583 chipset as Icy Box search B07Q7H5QLX , but will require a powered USB 3 hub. Info at James A Chambers blog new Raspberry Pi 4 bootloader USB network boot guide. Hopefully, this will help out

Question 3

Is this 10gbps or 20gbps?

Accepted Answer

It uses a JMicron JMS583.  From the JMicron documentation:
"The JMS583 is a USB 3.1 Gen 2 to PCIe Gen3 x 2 bridge controller between USB host and PCIe storage device. The USB 3.1 Gen 2 interface offers data transfer speed up to 10Gbps..."

Keep in mind that 8 bits = 1 Byte:
10Gbps = 1.25GBps

From looking at other Amazon listings, the JMicron JMS583 controller seems to be the most common.

Question 4

Item is listed as usb 3.2 (20gbps) but manufacturer's website says usb 3.1 (10gbps). am i missing something or item completely misrepresented?

Accepted Answer

It is a USB 3.1 Gen 2 10 Gbps.

ASIN	B0827PB71G
Best Sellers Rank	#409 in Enclosures
Brand	ineo
Color	M.2 NVMe SSD Type C Enclosure (C2597 NVMe)
Compatible Devices	Laptop
Connectivity Technology	USB
Customer Reviews	4.3 4.3 out of 5 stars (130)
Data Transfer Rate	10 gigabits_per_second
Enclosure Material	Silicone
Hard Disk Form Factor	22 millimeters
Hardware Interface	USB, USB 3.2 Gen 2
Hardware Platform	Windows
Item Weight	0.2 kg
Manufacturer	ineo
Mfr Part Number	C2597
Model Number	C2597
Supported Devices Quantity	1
UPC	797716581601

Ineo M.2 NVMe (PCIe) SSD USB10Gbps Type-C Rugged Militarized Enclosure with a Solid Metal Case and Built-in Write Protection Switch (Picatinny Rail Style) [C2597-NVMe]

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