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 (32650-90042).
