ACRONIS BACKUP AND RECOVERY 10 ADVANCED SERVER SBS EDITION - UPDATE 3 User Manual page 134

Any user with access to a managed vault on a tape library is able to perform these operations.
However two or more users cannot manage a tape library drive simultaneously, because some
operations can take minutes, hours or even days. For example, if a user launches a tape library
Rescan task, all other users' requests to perform the same task will be canceled automatically, as it is
already running on the vault.
Inventory
A storage node needs information about a tape in its own database to be able to operate with the
tape. So after the vault is created, generally the next step is to inventory tapes.
Inventorying is a procedure that allows the storage node recognize tapes that are currently loaded
into the tape library slots. It is relatively fast and normally requires reading the cartridge barcodes
without reading the tape data. If a barcode cannot be read, the tape will be mounted to read its
GUID identifier only.
The Inventory procedure can be run manually by a user or automatically, when access to recently
added tapes is required.
To launch the procedure select the tape library vault in the Navigation pane of the console, click
Manage tapes and then click Start inventory on the Tape Management window.
When inventorying is completed a user has the list of tapes currently loaded into the library.
Perform the procedure every time you load new tapes into tape library slots.
Rescan
As stated above the storage node keeps information about tapes and their contents in a dedicated
database. The Rescan task reads information about the content of user-selected tapes and updates
the database.
The task can take a long-time so it is only initiated manually. You should select each slot with a tape
you want to rescan before the task launch.
Run the Rescan task:

for tapes that are unknown for the storage node

if the storage node database is lost or damaged

for tapes whose content is out of date (for example, a tape content was modified through
another storage node or manually).
Bear in mind, a tape might keep some backups that were deleted before the tape rescanning. So
after the task is completed, all such backups will be recovered in the storage node database and
become accessible for data recovery.
At rescanning a tape label should be saved in the storage node database. If a slot, selected for the
procedure, contains a tape that still does not have a label, the Rescan task for the tape is paused to
perform the Labeling (p. 135) procedure.
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