ACRONIS Backup & Recovery 10 Advanced Server User's Guide Page 151

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Copyright © Acronis, Inc., 2000-2009 151
Ask for user interaction - the backup task will enter the Need Interaction state and wait for the
tape, with the required label, to be loaded into the tape library device.
Use a free tape - the backup will be written onto a free tape, so the operation will be paused only
if there is no free tape in the library.
Always use a free tape
If you leave the options below unchanged, then each backup will be written onto the tape specified
by the Use a separate tape set option. With some of the options below enabled, the program will add
new tapes to the tape set every time when a full, incremental or differential backup is created.
For each full backup
The preset is: Disabled.
When this option is enabled, each full backup will be written onto a free tape. The tape will be loaded
to a drive especially for this operation. If the Use a separate tape set option is enabled, only
incremental and differential backups of the same data will be appended to the tape.
For each differential backup
The preset is: Disabled.
When this option is enabled, each differential backup will be written onto a free tape. This option is
available only when using free tape for each full backup is selected.
For each incremental backup
The preset is: Disabled.
When this option is enabled, each incremental backup will be written onto a free tape. This option is
available only when using free tape for each full and differential backup is selected.
4.1.3.8. Tape rotation
If all backups are deleted from a tape, i.e. if information about the last backup on the tape is deleted
from the storage node database, the tape is considered as empty and can be reused during a backup
cycle. The same tape rotation enables you to get by with the minimum number of cartridges and not
to be buried in used tapes.
Acronis Backup & Recovery 10 enables you to achieve full automation of tape rotation while backing
up onto tape libraries.
This section provides you with useful information to choose a backup scheme and tape options for
tape rotation.
To calculate the number of tapes required for tape rotation schemes, you can use the method
described in the Tape planning (p. 163) section.
Choosing a backup scheme
When creating a backup policy/plan with a tape library destination, the following backup schemes are
available: Back up now, Back up later, Grandfather-Father-Son, Tower of Hanoi, or Custom. The
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