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InuNacho

macrumors 68010
Original poster
Apr 24, 2008
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In that one place
I'm running into issues with my 2018 Mini setup as in I have run out of ports and I'm starting to run into interference/disconnects when they're running at full tilt.
I know I shouldn't but I'm chaining drives off of a bus powered USB 3.1 Gen 2 hub on a Thunderbolt port this has lead to the above disconnects.

There are 3x slower rotational drives that often read/write to each other. Would a hub based around the USB 3 A port work good for them? Since they all have external power, could a cheaper unpowered 3-4 port hub work for them?

Are there any Thunderbolt 3 docks that have nothing but USB 3.1 Gen 2 for my faster RAID 0 SATA SSD and NVME enclosures plus bandwidth for any other devices plugged in?
 

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Last edited:
Are there any Thunderbolt 3 docks that have nothing but USB 3.1 Gen 2 for my faster RAID 0 SATA SSD and NVME enclosures plus bandwidth for any other devices plugged in?
Thunderbolt 4 docks are nothing but USB 3.1 gen 2.
Like the CalDigit Element Hub.
They use one or two USB 3.1 gen 2 hubs internally.
Thunderbolt 4 docks/hubs require macOS Big Sur or later for full compatibility.

Rotational drives don't need more than USB 3.0 for full performance. Some can reach 250 MB/s.

RAID 0 SATA SSD USB is not as fast as NVMe USB.

A USB 3.1 gen 2 hub (and this means all Thunderbolt 3 docks that use Titan Ridge and all Thunderbolt 4 docks/hubs that are used with USB devices) is limited by the upstream USB bandwidth of 10 Gbps.

An old Thunderbolt 3 dock with Alpine Ridge (such as OWC Thunderbolt 3 dock or CalDigit TS3+) have multiple USB controllers but only the Thunderbolt one is a full 10 Gbps. The ASM1142 is only 8 Gbps and the FL1100 is only 4 Gbps. But these are the only way to get > 10 Gbps USB bandwidth without buying additional Thunderbolt docks.
 
Thunderbolt 4 docks are nothing but USB 3.1 gen 2.
Like the CalDigit Element Hub.
They use one or two USB 3.1 gen 2 hubs internally.
Thunderbolt 4 docks/hubs require macOS Big Sur or later for full compatibility.

Rotational drives don't need more than USB 3.0 for full performance. Some can reach 250 MB/s.

RAID 0 SATA SSD USB is not as fast as NVMe USB.

A USB 3.1 gen 2 hub (and this means all Thunderbolt 3 docks that use Titan Ridge and all Thunderbolt 4 docks/hubs that are used with USB devices) is limited by the upstream USB bandwidth of 10 Gbps.

An old Thunderbolt 3 dock with Alpine Ridge (such as OWC Thunderbolt 3 dock or CalDigit TS3+) have multiple USB controllers but only the Thunderbolt one is a full 10 Gbps. The ASM1142 is only 8 Gbps and the FL1100 is only 4 Gbps. But these are the only way to get > 10 Gbps USB bandwidth without buying additional Thunderbolt docks.
My rotational drives are used as backups, media, and referencing large files. I've benchmarked them all and they only reach about 150MB/s.

The RAID 0 array reaches the 850MB/s mark, I don't recall the NVME but it is used in conjunction with one another. The RAID 0 is my video editing bay and the NVME is the Scratch Disk for all my creative applications.

Good info on Alpine Ridge, I'll look those up!
 
My rotational drives are used as backups, media, and referencing large files. I've benchmarked them all and they only reach about 150MB/s.
Here's a 270 MB/s example:
Of course, the random read/write are abysmal.

Good info on Alpine Ridge, I'll look those up!
Just remember on the newer docks you get more 10 Gbps ports (but they share a 10 Gbps upstream link)
An Alpine Ridge dock will only have one 10 Gbps port (the downstream Thunderbolt port). The ASM1142 controlled 10 Gbps port is actually only 8 Gbps and there's usually only one of those. The rest are all probably 5 Gbps USB (giving 4 Gbps of data) (there's two groups that share two 4 Gbps PCIe upstream links)
https://www.caldigit.com/ts3-plus-interface-bandwidth-allocation-and-diagram/
 
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