Air Cleaner User Manual

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.
CD/DVD Media Size
Specify the total size of the CD / DVD media in megabytes. If
a backup image exceeds this length, it will be split. Each image
that is split will have a number appended to the Backup file
image name. For example: If the backup file SB.sysback1.hd2
needs to be split another file called SB.sysback1.hd2.2 would
then be created automatically. Each time another split occurs
that numbe appended. In the case of double sided media, you
should only specify the size of one side of the media, not the
total aggregate size. This is a required option when the backup
device is a directory and this backup image will later be burned
to CD / DVD. The option does not apply to backups to tape or
TSM virtual devices. Using this option also requires the use of
the Media Available Space option.
Media Available Space
Specify the total size left on current CD DVD media in
megabytes. This value is used only when creating the first
CD/DVD image on CD1. It is the total size left after creating
the boot images, adding the device filesets and populating the
CD file system with all of the system files required on a system
boot. If you are not sure what the exact value is for your
environment, you may use the CD/DVD Media Size size less
125MB as this would accommodate the majority of
environments for the size of all the items listed above. For
example, if you had:
v 50 MB for device support filesets if added
v 25 MB for MCA boot image
v 25 MB for RSPC boot image
v 25 MB for CHRP boot image
The total is 125MB. If you wanted to create a boot CD to
support RSPC and CHRP systems, and include needed device
support, you would need to subtract 100MB from the CD/DVD
Media Size size and use that value here. If no value is
specified, the default value is 125. If a backup image exceeds
this length it will be split. Each image that is split will have a
number appended to the Backup file image name. For example:
If the backup file SB.sysback1.hd2 needs to be split, another file
called SB.sysback1.hd2.2 would then be created automatically.
Each time another split occurs, that number appended at the
end would then be increased by one. This is a required option
when the backup device is a directory and this backup image
will later be burned to CD / DVD. The option does not apply
to backups to tape or TSM virtual devices. Using this option
also requires the use of the CD/DVD Media Size option.
Format backup image on a 2gb limit?
This is a required option when the backup device is a directory
and this backup will later be burned to CD / DVD. The option
Chapter 4. Performing Backups 4-9