Thanks again for all the pointers.
What I end up doing is the following:
1. On Volume 1, tag all of the clips with relevant information gathered from the original filename or folder structure within a temporary, locally saved catalog.
2. Using bulk edit and increment following pattern, rename all of the clips to the standard naming convention and choose to rename the files at the OS level as well.
3. At the OS level, copy all of the newly renamed files to Volume 2.
4. Create a catalog on the CatDV Server and import all the clips that are now on Volume 2. None of the metadata is saved, but no worries!
5. Open the temporary locally saved catalog, sort the clips by name in alphabetical order.
6. Select All and perform a copy command (Ctrl C) from within the local catalog
7. Open the Server catalog and sort all clips by name in alphabetical order.
8. Select All and use Edit –> Paste Metadata…
All done!
Since the clips are in the same order on both catalogs, the metadata will be pasted onto the correct clips, no matter if they’re in a different volume location.