The current backup algorithm has a few problems:

• It fails to delete some files, which will confuse the system in the event of a restore (particularly segments).
• When changing storage volumes, it does not check to see if a file already exists before copying over it (even if it is identical).
• When copying to a new backup volume, all Aeon threads are busy, so everything on the server stops.

At minimum we need a process to mirror the backup volume (including deleting files as appropriate).