HP 3000 Manuals HP 3000 Manuals
What Should You Backup?
To completely back up your system, you should copy three types of
information:
* User and system files. User files are usually the largest part of
a system backup. They cannot otherwise be duplicated, except from
hardcopy. Since, in total, they can be the product of several
months or even years of labor, user files can be considered the
most important element within your computer system. All system
files are in groups within the SYS account; most system files are
owned by the PUB group of the SYS account.
* The file system directory. The file system directory contains
your account, group, and user structure, plus all associated
capabilities. Each volume set has its own directory that must be
saved to provide a complete backup.
* The current system configuration. The system configuration
includes system tables, queues, device I/O attachments, and other
parameters.
The various types of data are backed up using different mechanisms:
* System configuration information is backed up on a system load
tape (SLT).
* User and system files, and the file system directory are backed up
on STORE media, which can include tape, DDS, magneto-optical, or
disk.
Backing up system configuration files separately from other files is to
your advantage because user, system, and system directory files usually
change often while system configuration files change infrequently. Also,
with the capability of backing up each type of file separately, you can
avoid backing up any inadvertent corruption of system files while still
backing up your other files.
Use the SYSGEN program to create a system load backup to supplement a
STORE backup. The SYSGEN program enables you to back up the system
configuration. You cannot back up operating system and configuration
files with the STORE program. When you use STORE to perform system
backups, you must still use the SYSGEN program to create a system load
tape from which you can reload your system configuration.
To put SLT and store filesets on a single tape, you can use the combined
SLT and Storeset functionality. Refer to Chapter 10, "Backing Up the
System Configuration," for details of using the SYSGEN utility and
combining an SLT and Store set.