New release of UD. You can read the Release Notes for the changes.
There are known issues with the 'Dev X' assigments:
There is a case where the order in which disk devices are installed, removed, and then re-installed can cause the device to not get assigned a 'Dev X' designation. UD will then mark the device as 'Array' which disables all UD functionality on that device. This will be fixed in 6.10-rc3. There are several ways to handle this.
Stop the array and then restart the array. The 'Dev X' designations will be reset.
If it's a device you install that is auto mounted, UD will go ahead and execute the device script and there is no problem.
Reboot. Geez, I hate to even suggest this. Rebooting to me is a terribe solution.
Due to a misunderstanding on my part, I incorrectly stated that the 'Dev X' designations were consistent with the device serial number. They aren't. A fix is coming, but won't be in the first release of 6.10. We are still trying to decide the best way to handle this because UD devices come and go and we have to some how bound the devices so Unraid doesn't track every single device ever installed in UD that may never be installed again.
In order to help a bit with the 'Dev X' designations not being consistent, I've added the last 'Dev X' assigned to a device in the 'Historical Devices' section.
Because of the way 'Dev X' assignments are made, you will see that the 'Dev X' assignment will generally be consistent with the device serial number.