HP 3000 Manuals HP 3000 Manuals
Backing Up the System Configuration
MPE XL uses the SYSGEN Utility Program to create system load tapes that
backup your system configuration.
SYSGEN can generate an exact image of the current system, or a new or
modified image. From the image it can then create a system load tape. A
system load tape contains the system load utilities and base system
files.
SYSGEN requires that you have System Supervisor (OP) capability to view
system configuration data and System Manager (SM) capability to save
changes and create tapes.
SYSGEN provides a series of command-driven user interfaces, and online
HELP facilities that describe the systems command syntax and options.
Through the interfaces, referred to as configurators, you can build new
system configurations and generate system load tapes that contain the new
configurations.
SYSGEN stores configuration data in a group of files that are maintained
by one or more of the four 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 configuration of the system and a
LOG configurator for making changes to the type and quantity of system
and user log files.
The basegroup is the group selected 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 basegroup is not specified, the default group
becomes the basegroup.
The default group will generally be CONFIG.SYS. CONFIG.SYS is a permanent
file set containing information on device classes, assigned I/O paths,
assigned ldev numbers, and various data in system files.
When changes are made to the system configuration, the existing
configuration files remain valid until you formally keep the new
information through the SYSGEN >KEEP command. Until you >KEEP the
changes, you can always back out of them. You may KEEP to the basegroup
or to a group you specify.
The configuration of the system itself remains unchanged until the new
configuration is made effective by rebooting the system. If the new
configuration is saved under a name other than CONFIG.SYS, the new name
must be specified when rebooting. Depending on the source from which the
system is to be rebooted (tape or disk) use the UPDATE or INSTALL
utilities, or specify the appropriate form of the START utility. (Refer
to Chapter 2 of this manual, and System Startup, Configuration and
Shutdown Reference Manual (32650-90042).
Multiple configurations can be kept on disk and stored to tape through a
full system backup. When you keep your changes to another group name
(for example, CFIGNEW) a new group is created in the SYS account.
When a system load tape is generated, however, the current configuration
data is always written to tape as CONFIG.SYS regardless of what your
working name for the group is in the disk. 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).
Running SYSGEN
To run SYSGEN, enter:
:SYSGEN basegroup,newgroup,inputfile,outputfile
All of the parameters are optional. The command optionally allows the
INFO parameter specification to redirect input and output from and to
alternate sources:
:RUN SYSGEN;INFO="basegroup,newgroup,inputfile,&
outputfile"
The basegroup is the group in the account SYS that contains the
configuration data you will use or alter. The default is the group used
to boot the system, usually CONFIG.SYS. If you specify a group that does
not exist, an error occurs. You can change basegroup within SYSGEN with
the global basegroup command.
The newgroup is the group to which you will store your data. If you do
not specify this parameter, SYSGEN stores the changes to the basegroup.
If the group you specify already exists, SYSGEN asks you whether you
actually want the configuration data written to that group. To override
the newgroup, specify an alternate group with the SYSGEN >KEEP command.
The inputfile is the actual file designator of the file for command
input. The formal file designator is SYSGIN. The default is $STDIN. You
also can use a file equation to change the command input file.
The outputfile is the actual file designator of the file for output
requests. The formal file designator is SYSGOUT. The default is
$STDLIST. You also can use a file equation to redirect output.
Use file equations to change input to a command input file and/or
redirect output to the line printer:
:FILE NEWOUT; dev=lp
:SYSGEN ,MYGROUP,NEWIN,*NEWOUT
or
:FILE SYSGIN=NEWIN
:FILE NEWOUT;DEV=LP
:SYSGEN ,MYGROUP,,*NEWOUT
When you execute SYSGEN you receive a list of SYSGEN first level
commands. The text of the title may not be identical to that illustrated
below.
SYSGEN version B.06.00 : catalog version B.06.00 THU, SEP 17, 1987, 3:01 PM
Copyright 1987 Hewlett-Packard Co. All Rights Reserved
**warning** no NMCONFIG file in this configuration.
**warning** NMCONFIG.PUB.SYSTEM is now the NMCONFIG fil
** First level command **
io log (lo) misc (mi) sysfile (sy)
basegroup (ba) keep(ke) permyes (pe) show (sh)
tape (ta)
clear (cl)(c) exit (ex)(e) help (he)(h) oclose (oc)
redo
sysgen>