RSM Media Pools
Acronis Backup & Recovery 10 uses Windows Removable Storage Manager (RSM) to manage tape cartridges belonging to tape libraries.
To separate access to media by different programs the RSM uses so called Media Pools that are logical media groups. There are two categories of media pools in the manager: System and Application.
System media pools include Free pool, Import pool and Unrecognized pool. The System pools hold media that are not currently used by applications. The Free pool holds media that are considered as free and can be used by applications. The Import and Unrecognized pools are temporary pools for media that are new in certain library.
Through RSM an application can get its own pools with proper names, move media from the Free pool into its own pools, use its own pools’ media for correct purpose, return media to the Free pool, etc.
Acronis Backup & Recovery 10 Storage Node manages the tapes belonging to the Acronis pool.
If you fill tape library slots with unused tapes, all the tapes will be included into the Free pool automatically.
If a tape was used previously, the RSM tries to detect the registered application the tape is concerned to. If the application is not found, the RSM will move the tape into the Unrecognized pool. If the application is not found, but the RSM database has no information about the tape, it will be moved into the Import pool. If the RSM database has the information, the tape moves into its own pool of the application.
Acronis Backup & Recovery 10 Storage Node provides the RSM to detect the tapes written by Acronis True Image Echo, Acronis True Image 9.1 product families and by components of Acronis Backup & Recovery 10. The storage node will locate all tapes written in “Acronis” format into the Acronis pool at the Inventory operation.
Acronis Backup & Recovery 10 components don’t use the Unrecognized pool. To utilize a tape from this pool forcibly, move the tape to the Free pool using the Removable storage snap-in (Control panel > Administrative tools > Computer management > Removable storage > Media pools).
If a tape has moved into the Free pool, it is considered as free and will be accessible to write by any application. So the tape data will be lost.
If all the backups are deleted from a tape, it will not return to the Free pool. It remains in the Acronis pool as a free tape to be reused. So if a storage node needs a new tape, it finds a free tape first in the Acronis pool, then in the Free pool.
Thereinafter Acronis Backup & Recovery 10 Storage Node deals only with the tapes belonging to the Acronis pool.