Resolving my own issue.
After copying all poolpart folders to an intermediate drive, cleaning the shucked drives & re-initialising them, I copied back their respective poolpart folders and the pool was automatically recognised. It only needed a recalculation of duplication.
So it appears that the poolpart folders contain all information to recreate the pool, regardless of the disk's volume ID. The reason I started this thread was because I saw in a post by Christopher that Drivepool uses the volume ID to identify the disks and I was worried that after cleaning the disks, I wouldn't be able to get Drivepool to recognise them as being part of the pool. Happy ending I guess!
