Recently changed an HBA controller and after restarting my server i have the odd situation where all the array drives are showing in both the Array AND Unassigned devices. But with one difference.

 

The ones in Unassigned devices are showing the original sda, sdb, etc and the ones in the array are showing newer designations sdj, sdk, etc.

 

I'm guessing that when i switched the cards Unraid decided all the drives were new (hence the new designations). But thinks the 'original' drives are still there as well.

 

Any idea on how to clear this?

Unraid does not use the ‘sd’ type devices to recognise the drives (it uses their serial numbers) so something else happened.  Normally the symptoms you describe are caused by the drives temporarily dropping offline and then reconnecting and Unraid is not hotplug aware so cannot handle this for array drives.
 

You are likely to get better informed feedback if you attach your system’s diagnostics zip file to your next post in this thread. It is always a good idea when asking questions to supply your diagnostics so we can see details of your system, how you have things configured, and the current syslog.