MP 1,1-5,1 Samsung SSD QVO disconnecting

[Jean-Francois Tellier]

Hello!
I am using a Mac Pro Early 2008 Yosemite 10.10.4 and Mac Book Pro 2011 High Sierra.
I am trying to connect an external Samsung SSD 860 QVO with a StarTech.com Universal Hard Drive Docking Station (two disks).
The StarTech is connecting to my Mac Pro.
I already got a Sandisk SSD Pro 480gb connected to the Startech. This disk is working normally.
The second disk, a Samsung QVO worked well for about two weeks.
Since then, every time I connect the QVO disk, it disconnects just after mounting in the finder.
One second it appears and suddenly I get an error about drive ejected not properly.
I tried to use the QVO in a different disk bay (StarTech 1-2), same result, connect and disconnect.

Do you have a clue?
How can I fix it? What may be the cause?
I will be grateful for any help.
Best regard,

 

[tsialex]

Samsung QVO drives are not compatible with Mac Pros, there are dozens of reports about QVO problems with Mac Pros, just use the search.

Change for a EVO or PRO model.