I recently bought myself a simple USB 3.1 gen 2 external disk enclosure (4 bays; no raid; JBOD) to connect to my ESXi 7.0 host, and passthrough the disks to a VM.
The problem I experience is that when the host is running, and I connect the enclosure, the disks constantly spin up and down... I suspect something caused by power saving. If I do a LSUSB I see the disks, but it looks like they are rescanned al the time, as I see the number going up and down via the LSUSB command.
The strange thing is that when I reboot my ESXi host during the up and down spinning of my disks, the disks become stable (stay up) during the reboot process.
Once the ESXi is started up, the disks stay spinning, and are fully operational and working. After reboot the LSUSB results are also stable.
It is only after I shutdown and start the enclosure again, the problem starts again.
I have the issue on all my USB ports (3.1 gen 1 & gen 2).
When connecting the enclosure to a Windows or Linux host, everything works perfectly.
Anyone experience with this?
/J