HP 3000 Manuals HP 3000 Manuals
Features SYSGEN lets you add, replace, and delete program files, boot files, and system libraries on a system load (boot) tape. SYSGEN can be used to create a whole series of boot tapes that will each load and start a different, fully configured MPE XL system. These functions are executed through the SYSFILE Configurator. The IO Configurator lets you add, modify, list, and delete device configuration information. The LOG Configurator controls user logging files, and is used to turn logging on and off. The MISC Configurator lets you set various system values and limits that control access to system resources. System Manager (SM) capability is required to exercise these functions. System Supervisor capability (OP) is required to view system configuration data. SYSGEN differs from SYSDUMP in that it does not support system configuration during system initialization. This new feature offers greater flexibility and convenience for developing system configurations. How MPE XL Stores Configuration Data MPE XL stores configuration data in several files which, together, are stored in a group. The primary group, known as the basegroup, is by default named CONFIG.SYS. When running SYSGEN, if the parameter basegroup is specified, SYSGEN looks for a group name in the account .SYS. If basegroup is not specified, the default is the group used to bring up the system (usually CONFIG.SYS). The files in the CONFIG.SYS group are stored on the system disk, and also may be stored on a system backup tape or a system load tape. Unless instructed to look for a different .SYS group name, the system looks for the CONFIG.SYS group during any boot process that specifies a boot from disk. MPE XL also can store configuration data in other groups in the .SYS account. If the group does not exist, SYSGEN will create it. This ability to store configuration files in different groups makes it possible to create and store, either on disk or tape, multiple copies of your current configuration. It also lets you create and store as many different versions of configurations as space allows. For example, you can modify an existing basegroup to create a different system configuration. You can store the new configuration on disk, under its own name, by specifying its name as the newgroup parameter of the SYSGEN KEEP command. How SYSGEN Works The SYSGEN utility is used to create, modify and operate on MPE XL configuration groups. It does so through several sets, or levels, of commands. The first level of SYSGEN commands contains four commands that access four subsystems, known as "configurators." These are the IO, LOG, MISC, and SYSFILE configurators. The first level also contains a set of global commands. The global commands are used to change or display configurations, save changes, clear changes, generate system load tapes, and set and display global parameters. All of the global commands operate at the first level, that is, at the SYSGEN> prompt. Several commands (CLEAR, EXIT, HELP, OCLOSE, and REDO) also operate at the second level of commands, that is, from within the four configurators. In addition to the global commands named above, each configurator contains a set of commands (second level) which are used to create and modify the data in the files in a configuration group. The SYSGEN first level and second level commands and their functions are described in Table 3-1 . Although the commands that access the configurator subsystems are first level commands, they are not included in Table 3-1 . The configurator subsystems, their functions, and a command used only at the subsystem level (HOLD), are described in Table 3-2 .