USB 3.0 external SSD speed problems

[Mac Hammer Fan]

USB 3.0 Bus:
Host Controller Driver: AppleUSBXHCIFL1100
PCI Device ID: 0x1100
PCI Revision ID: 0x0010
PCI Vendor ID: 0x1b73
USB3-to-SATA Bridge Device:
Product ID: 0xb0b4
Vendor ID: 0x1e91
Version: 0.00
Serial Number: 4F435A2D35345334335550304B3238575A595243
Speed: Up to 480Mb/sec
Manufacturer: OEM
Location ID: 0x00400000 / 7
Current Available (mA): 500
Current Required (mA): 500
Extra Operating Current (mA): 0
Media:
Voyager Q:
Capacity: 3 TB (3.000.592.982.016 bytes)
Removable Media: No
BSD Name: disk8
Logical Unit: 0
Partition Map Type: GPT (GUID Partition Table)
USB Interface: 0
This happens on 2 different computers: a MacPro 5,1 en MacBook Pro 11,4
It started with lockups in Mojave on de Mac Pro. De USB disk appeared afterwards only after zapping the PRAM on the MacPro. The lockups were caused by moving the mouse while running disk utility under Mojave.
Speed is only occasionally up to 5Gb/sec but most of the time 480 MB/sec.

 

[chrfr]

This is likely due to the enclosure or cables. Have you looked for firmware updates for the enclosure?
The Mac Pro 5,1 is only a USB 2.0 computer so unless you've added a USB 3.0 card, 480Mb/sec is to be expected there.

 

[Mac Hammer Fan]

I have added a PCI 3.0 card in my MacPro. The enclosure has always worked without a problem until I installed Mojave.
BootRom is 144.0.0.0.0
The enclosure is https://www.newertech.com/products/voyagerq.php

 

[chrfr]

I have added a PCI 3.0 card in my MacPro. The enclosure has always worked without a problem until I installed Mojave.
BootRom is 144.0.0.0.0
The enclosure is https://www.newertech.com/products/voyagerq.php

I would contact NewerTech/OWC to see what they have to say about it.
Edit: I regularly use a differently branded version of the same product in Mojave without any speed issues on a variety of computers.

 

[Mac Hammer Fan]

Perhaps my USB 3.0 card caused the problem. I had several lockups under Mojave. Everything worked well under High Sierra. After the lockups, the card didn't work until I zapped the PRAM. The lockups occured when I ran disk utility to check the internal startup disk and I moved the cursor or mouse.
The USB card is this one: FRESCO FL1100 bought on ebay for 30$. Perhaps this card damaged the NewerTech Enclosure.
Is the Sonnet Allegro USB 3.0 card fully compatible with Mojave?
https://www.sonnettech.com/product/allegrousb3pcie4port.html

 

[chrfr]

Is the Sonnet Allegro USB 3.0 card fully compatible with Mojave?
https://www.sonnettech.com/product/allegrousb3pcie4port.html

It says it's Mojave compatible right on the page for the card.

 

[Mac Hammer Fan]

I have read the reviews on Amazon.de and there is a problem of interference with the Bluetooth module.
https://www.amazon.de/Sonnet-Techno...r&reviewerType=all_reviews#reviews-filter-bar
56% rates 5/5 but 44% 1/5.

 

[chrfr]

I have read the reviews on Amazon.de and there is a problem of interference with the Bluetooth module.
https://www.amazon.de/Sonnet-Techno...r&reviewerType=all_reviews#reviews-filter-bar
56% rates 5/5 but 44% 1/5.

Interference between USB 3.0, Bluetooth, and 2.4GHz wifi is common, regardless of the particular devices involved.