iSCSI Virtual Disks Missing After Reboot

Hi guys.  I recently had to reboot my Windows 2012 Storage Server.  When it came up, the physical disks that the iSCSI virtual disks reside on were visible, as were the VHD files, but the targets were gone.  I looked in the File and Storage Services -> iSCSI but it says 'There are no iSCSI virtual disks', even though the VHD files are clearly there.  When I try to import the already existing ones, it gives me an error because that file already exists in the place I want to put it.  These are very large VHD files so moving them to other storage and then re-importing them could take days, if not longer.  

The iSCSI targets are still visible under 'View All Targets', but they are no longer associated with their VHD files.  How do I reassociate them?  And why did they disappear in the first place!?

Thanks for any help!

-Warren