A complete system backup consists of system files, user files, the file system
directory, and system configuration information. STORE copies only
system and user files and the file system directory to backup.
To back up your system configuration, use the SYSGEN utility.
This creates a system load tape (SLT). A system load tape contains
system configuration information, and all the system files necessary
to boot and run a basic system.
SYSGEN requires that you have system supervisor (OP) capability to view system
configuration data and system manager (SM) capability to save changes.
SYSGEN provides a series of command-driven user interfaces
and online help facilities that describe command syntax and options.
Through the interfaces, referred to as configurators, you can build
new system configurations and generate a system load tape based
on the new information.
SYSGEN stores configuration data in a group of files that
are maintained by one or more of the five system configurators.
Each configurator provides you with an interface to make changes
to an independent portion of the configuration data. For example,
there is an I/O configurator that allows you to change the physical
makeup of the system and a Log configurator for making changes to
the type and quality of system and user log files.
The base group is the group containing the set of configuration
files to be read or modified by SYSGEN. The default group is the
group that was specified (or defaulted to) when the system was started.
If a base group is not specified, then the default group becomes
the base group. The default group is generally CONFIG.SYS.
CONFIG.SYS is a permanent fileSet containing information on device
classes, assigned I/O paths, assigned LDEV numbers, volume names, and various
data in system files. When changes are made to the system configuration from
one or more of the configurators, the files remain unchanged until you formally
keep the new information through the SYSGEN KEEP command. You can
always back out of changes until you actually keep them. You may KEEP
the base group or to a group you specify.
Multiple configurations can be kept on disk and stored to backup through a full
system backup. When you KEEP your changes to another group name (for
example, CONFG950), a new group is created in the SYS account
with an identical fileset. When a system load tape is generated, however, the
current configuration data is always written to the SLT as CONFIG.SYS
regardless of what your working name on disk is
for the group. This reduces confusion over which group is the current
configuration or what its original name was if you suddenly have
to regenerate a system. For information on changing or creating configurations
groups, refer to System Startup, Configuration, and Shutdown
Reference Manual.