Acronis Backup & Recovery 10 Adv WS TIDLBPDES User Manual
Product codes
TIDLBPDES
Legend for the case example figures
Any daily/incremental backup (16 GB) is shown in the figures as a green rectangle:
.
Weekly/differential backups (40 GB) are displayed as a blue rectangle:
.
Any full monthly backup (320 GB) is drawn in orange:
.
A whole tape (400 GB) is drawn as a gray rectangle:
.
Using the Grandfather-Father-Son tape rotation scheme
Tape rotation for the GFS backup scheme is substantially defined by the tape options specified for the
backup policy/plan to be created.
backup policy/plan to be created.
Assume the GFS settings are the following:
•
Start backup at:
11:00:00 PM
•
Back up on: Workdays
•
Weekly/Monthly: Friday
•
Keep backups:
Daily: 2 weeks; Weekly: 2 months; Monthly: 1 year.
The main goal is to achieve full automation of tape rotation for these settings.
Keep in mind that a monthly backup is full, a weekly backup is differential, and a daily backup is
incremental in this implementation of the GFS scheme. The first backup is always full. So if the
backup policy/plan starts on Wednesday and full backups should be created on every fourth Friday,
on Wednesday the first backup will be full instead of an incremental one.
incremental in this implementation of the GFS scheme. The first backup is always full. So if the
backup policy/plan starts on Wednesday and full backups should be created on every fourth Friday,
on Wednesday the first backup will be full instead of an incremental one.
There are analyzed examples showing how the GFS scheme can be combined with different tape
options in the following sections:
options in the following sections:
•
GFS Example 1 (p. 141). The Use a separate tape set option is selected. All the Always use a free
tape options are cleared. It requires 25 tapes in rotation.
tape options are cleared. It requires 25 tapes in rotation.
•
GFS Example 2 (p. 145). The Use a separate tape set option is selected. The Always use a free
tape: For each full backup option is selected. Other Always use a free tape options are cleared. It
requires 16 tapes in rotation.
tape: For each full backup option is selected. Other Always use a free tape options are cleared. It
requires 16 tapes in rotation.
•
GFS Example 3 (p. 146). The Use a separate tape set option is selected. All the Always use a free
tape options are selected. It requires 28 tapes in rotation.
tape options are selected. It requires 28 tapes in rotation.
These examples demonstrate how the number of tapes required for automated rotation depends on
the tape options. If a tape library does not have enough tapes for automated rotation, the Tasks
Need Interaction window will sometimes ask you to load a free tape into the library.
the tape options. If a tape library does not have enough tapes for automated rotation, the Tasks
Need Interaction window will sometimes ask you to load a free tape into the library.
GFS Example 1
Suppose, the backup plan has the following tape options:
•
the Use a separate tape set option is selected
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