Air Cleaner User Manual

Performing an Offline Mirror Backup
The Offline Mirror Backup process is comprised of two pieces. This first piece is
the Offline Mirror process which:
v Splits the AIX mirrors
v Calls the Backup Command File
v Re synchronizes the AIX mirrors after completion of the Backup Command File.
The second piece of the Offline Mirror Backup is the actual data backup process
which is used to execute the backup. You may also use this script to perform other
actions like restarting a database that was halted before the mirrors were split.
Note: It is not necessary to halt your database for the mirror re synchronization
process at the end of the Offline Mirror Backup. However, it is still highly
recommended that you halt your database while the mirrors are being split
and the data backup begins.
The SysBack backup commands in the Backup Command File can backup data that
is mirrored and data that is not mirrored. For example: If you specify to split all of
the mirrors in datavg the Offline Mirror Backup process, you may also include
rootvg and appvg in the same backup process even if they are not mirrored. The
SysBack backup command used in the Backup Command File will take the
appropriate actions to backup the split mirrors as appropriate, and the default
resources when it isn’t.
Note: The boot logical volumes and paging spaces do not have to be mirrored in
order for the Offline Mirror Backup to process successfully. In most cases, it
is not advisable to mirror them. The SysBack Offline Mirror Backup process
will not attempt to split their mirrors. However, if you have specified a
JFSLOG to be split and backed up, the JFSLOG must be mirrored.
To initiate an Offline Mirror backup:
1. Log in as the root user.
2. Type smitty sysback and press Enter.
3. Select Offline Mirror Backup Options and press Enter.
The following menu will display:
6-2 IBM Tivoli Storage Manager for System Backup and Recovery: Installation and User’s Guide