Air Cleaner User Manual

Note: The maximum physical partition size varies by level of AIX installed
at the time that the backup was created.
If you change the current value, you will receive the following prompt:
Changing the PP size requires the recalculations of all logical volume sizes. Some
LVs may increase in size when using a larger PP size.
Are you sure you want to change the PP size? (y/n)
To not change the size, press “n”. Otherwise, press “y”. All logical volume
sizes will be recalculated because they are based on the physical partition
(logical partition) size of the volume group.
Changing the partition size might require added space to be used by a
logical volume. For instance, assume the current volume group has a
partition size of 4 MB, and a logical volume within the volume group uses
3 partitions (12 MB). Changing the partition size to 8 MB for the volume
group requires that 2 partitions (16 MB) be used for the same logical
volume to ensure adequate space for the prior data.
Quorum Checking?
Enter “y” or “n” to indicate whether or not quorum checking should be in
effect for this volume group. Quorum checking ensures that there are
always a majority of volume group descriptor areas available for this
volume group.
Copies
Set this option to globally mirror, or unmirror, all logical volumes in this
volume group. By default, this field’s value is Not Set. This means that
number of copies of each logical volume will be set exactly as it was on
the backup image.Valid options are 1, 2, and 3. If you are increasing the
number of copies for the volume group, you must ensure that you have
enough disks assigned to the volume group to support the extra copies
before beginning the installation.
If you do not have enough disks assigned to the volume group to support
the number of copies at the time that the installation is started, SysBack
will detect this and prompt you to indicate whether or not that you would
like to continue. Indicating a “no” response will return you to the SysBack
installation menu so that you can adjust your choices. Indicating a “yes”
response will cause SysBack to automatically adjust the number of copies
to support the number of disks assigned to the volume group.
Note: If you set this option globally across the volume group, you may
override this setting for any individual logical volume to utilized a
different number of copies using the Change Logical Volume
Attributes menu.
Concurrent-capable?
Enter “y” or “n” to indicate whether or not this volume group should be
concurrent-capable, allowing the physical volumes in the volume group to
be attached to be shared by more than one host.
Auto-concurrent Varyon?
Enter “y” or “n” to indicate whether or not this volume group should be
varied on in concurrent mode. This option is not available unless you also
selected “y” for the Concurrent-capable prompt above.
11-6 IBM Tivoli Storage Manager for System Backup and Recovery: Installation and User’s Guide