Air Cleaner User Manual

the server for use by this system using the cfgremaccess command, then you can
also select a hostname using the -h option. The backup is then written to the
device or filename on the specified server, provided the server has enabled this
system access to the specified device or directory.
The backup can also be performed as a “pull” backup to enable central
management of backups. The machine that “pulls” the backup is called the
“initiator,” while the machine that is backed up is called the “backup system.” The
machine that receives the backup data is called the “destination system.”
The initiator is the machine where the mkdirback command is issued. The backup
system is referenced in the command syntax by the -U “host” flag. The data
destination system is referenced by the -h “host flag”.
When only the -U “host” flag is specified, the -f “device” flag refers to a device on
the initiator system. In this case, the backup destination and the initiator are the
same system. This is known as a “two-way pull backup.”
When the -U “host” and -h “host” flags are specified, the -f “device” flag refers to
a device on the host specified by the -h “host” flag. In this case, the backup
destination and the initiator are different systems. This is known as a “three-way
pull backup.”
Remote Services must be configured, using the cfgremsvs command, on all of the
machines involved in the backup operation, the initiator, the backup system, and
the data destination machines. The backup destination machine must have the
Server Options of Remote Services configured to allow the backup system machine
to send its data to devices on the backup destination machine. You can do this
with the Add or Change Client Host Access to this Server option or the
cfgremaccess command.
The backup system machine must have the Client Options of Remote Services
configured to specify the backup destination machine as a backup host. You can do
this with the Add or Change List of Remote Backup Servers option or the
cfgremserver command.
The backup system must also configure Remote Command Access to allow the
initiator machine to pull the backup.
To include network support in the boot images of the tape, specify the -N nettype
option. This enables a network installation to be performed after booting a system
from this tape. This flag is valid only when a tape device is used. Valid network
types are ethernet, token ring or FDDI. You can also specify a device name (such as
/dev/ent0, /dev/tok0 or /dev/fddi0) for the nettype parameter.
The sysback command calls the mkvginfo program to generate information on
volume groups, logical volumes, filesystems, paging space, and physical volumes.
This information can be used later to recreate the system or any of the included
volume groups to its original state. The mkvginfo command creates a temporary
file that is placed in the table of contents on the backup, or you can create a
customized file using the mkvginfo and editlvminfo commands and include it
instead on the backup by also specifying the -g “filename” option to this
command. Files, or files within directories, that are specified in the exclude list are
not backed up with this command. See the chexcludelist command for information
on creating exclude lists.
Appendix A. Commands A-91