Air Cleaner User Manual

backups on a tape that has been rewound or ejected. Also use
this option when the system has been restarted or when the
block size of the tape driver has been changed from the last
backup.
Buffer size (In Kbytes)
Default=64. Changing this value either increases or decreases
the amount of data that is written to the output device in a
single I/O operation. Some devices with small buffers might
require you to reduce this value, while other devices with very
large buffers can benefit from increased performance by
increasing this value. If you are unsure, use the default value.
This value must be a multiple of the tape block size.
Preserve physical partition mapping?
Default=no. Selecting “yes” to this option ensures that all
logical volumes will be recreated from this backup using the
same physical partitions that are currently allocated to them.
Unless the logical volumes were originally created using
physical partition maps, it is generally recommended that they
not be recreated using the same partitions, because this
preserves fragmentation that develops over time as logical
volumes and file systems expand.
When you recreate a volume group or logical volume or
perform a system installation, you can choose whether or not to
use the prior partition map. If the original physical volumes do
not exist or are not large enough to contain the same partitions,
the logical volumes will be recreated without using the maps.
Device name for remote volume prompt
Default=(Blank/None). Enter a TTY, LFT or PTS device name to
send the volume prompt to a specified device rather than to the
current SMIT screen. If you are backing up to a remote host,
the device name you specify is attached to the remote host.
This field is displayed only when the backup device is a tape
drive or virtual device.
Examples of device names are /dev/tty0, /dev/lft0 and /dev/pts/5.
You can determine the terminal device name by typing tty at
the command line on that device.
Overwrite existing backup with same ID?
Default=no. If the Backup File ID field contains a value already
used for an existing system backup, change this field to “yes”
by pressing Tab. Doing so indicates that you want to overwrite
the previous backup with this backup. After you begin this
backup, the prior disk image files are removed and cannot be
recovered. This field is displayed only when you back up to a
disk image file.
Hostname to Backup
The hostname of the backup system, the machine that will send
its data to the data destination server.
Exclude List File Name
Specify the full qualified path and file name of a SysBack
exclude list. If this field is left blank, the backup process will
process the contents of /usr/lpp/sysback/.exclude_list
automatically.
4-20 IBM Tivoli Storage Manager for System Backup and Recovery: Installation and User’s Guide