Why even powered TB4 hubs does the: Disk Not Ejected Properly?

Question

Why even powered TB4 hubs does the: Disk Not Ejected Properly?

Even when using powered TB4 hubs OWC that feeds 2 UGREEN Revodok Max 208 ( all 3 docks with plug in power supply) , and with great nvme's connected get Disk Not Ejected Properly!

NVME list: Seagate 4bt top tear, samsung 980/990, Sabrent all in Ugreen well ventilated TB4 enclosures. New cables that never moves away from rack.

Some days it works well other days they just keep on ejecting.

What can be the problem ?

MacBook Pro 16″, macOS 14.5

Posted on Jan 26, 2025 8:11 AM

Reply

Answer 1

steve626

Level 6

13,791 points

Jan 26, 2025 5:14 PM in response to CristiSparfis

There is a limit on how many devices can be connected (6 per port):

About the Apple Thunderbolt Pro Cables - Apple Support

I count more that 18 in your last message, but using the multi-drive hubs might get past that limitation. I don't understand what the real constraint is.

To narrow down what is working and what isn't, I would do a test and run with one hub at a time, each for a day or two, to see if the issue persists and with which external device(s). I have had individual hubs malfunction or even fail. If none of them fail individually but they do eject disks improperly when used together, that is also informative.

Reply

Answer 2

dialabrain

Level 10

135,761 points

Jan 26, 2025 8:32 AM in response to CristiSparfis

First, have you updated to Sonoma 14.7.2?

I had the problem on occasion when I closed the lid of my M1 MacBook Air. It was more often on Sonoma than it is now in Sequoia. Still happens once in a while. Hasn't seemed to have caused a problem. I'm not even sure the drive is ejected. It may just bring up the message.

Reply

Answer 3

Jan 26, 2025 1:43 PM in response to dialabrain

In my case the disconnecting and reconection si happening very fast and the davinci resolve software start to see just as dropped frames :) since I am feeding the BRAW directly from the ssd's. I have to decide what NAS to buy that has thunderbolt also and SFP+ and to install 4x 20 TB exos there. I have also 8 hdds: 4 exos in Thunderbolt Lacie D2 (4 hdds) and other 4 exos in usb c enclosures all separate, 4/6/8/10/12/14/16/18/20TB. As I needed more space I bought bigger ones and I end up with that many drives.

Reply

Answer 4

Jan 26, 2025 1:39 PM in response to steve626

so now are all 3 hubs connected separate directly to the macbook ports and drives are disconnecting less but they still do.

Reply

Answer 5

steve626

Level 6

13,791 points

Jan 26, 2025 11:28 AM in response to CristiSparfis

It might be that you have daisy chained multiple docks. They might not be designed to be used that way. You could contact OWC support to inquire.

You could also try removing those all but one dock and see if the issue is gone, if so that would be the answer. Otherwise try different combinations to see if that changes the behavior.

Reply