I've been running DrivePool 2.2.0.651, and Stablebit Scanner. Single pool of 4 3TB drives, on Windows 8.1. I've set folder options to show hidden and system files.
I removed one of the drives from the pool, and DrivePool dutifully transferred its files off the disk. An identical disk has been re-added to the pool.
Subsequently, I noticed the following on two of the remaining drives: Within the primary pool partition folder there has appeared another pool partition folder with the same GUID, and within this folder, another folder with the same GUID, and so on, five levels deep. There is also a .covefs folder in each of these nested folders.
Is this normal? I ask partly because I've been unable to delete another, separate, multi-nested folder structure on the pool (file not present errors), and am concerned there might be some type of creeping file system corruption going on. Chkdsk and Scanner scans are OK, however.