I am using native sbs 2011 backup, configured via the console. Backup destination is Tandberg RDX USB Drive, configured to be displayed as local drive, so it can be used by Windows Backup.
However, when I try to eject the disk and put another one, I cannot eject the disk.
Process monitor shows that the disk is access by the following proccesses: Virtual Disk, Block Level Backup Engine and HP Insight Storage Agents Service.