Open Migrator device status changed to Not Attached

I have a server with 16 1.2TB drives attached  as Physical Compatibility RDM's, The array those RDM's are coming from is going away. I presented 16 1.2TB RDM'S from the new array, installed Open Migrator, and Attached to all 32 data drives. After I got the reboot, I verified the status showed "Attached" and I started the first 5 drives migrating. As they would complete, I would start the next drive.

Skip ahead 24hrs or so, I went to start more drives, and noticed that 3 of my new drives are now showing up as Not Attached, and they don't show up as available targets when I try to start a new migration.

I dug through the log files. Found where the Filter driver is installed, but not attached. Then after the reboot, they show up as attached.

Has anyone seen this before? Does anyone know a fix without rebooting? The option to attach to the volumes is greyed out, so I'm hoping it's some sort of GUI bug. Anyone know of a service I can restart.

It nearly took an act of congress to get approval to reboot this server (It's the PACS imaging server for the Radiology department at a very large hospital), so I'm desperately hoping there's a way to get this resolved without additional reboots.    

Any suggestions would be greatly appreciated,    

Thank you

Bimmer