System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Chapter 3
System Startup Functions
Updating the Operating System
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Updating to Recover from System Failure: a Preview
If your system fails, you have many options to use to help recover your system. Use the UPDATE utility as a
recovery method only after doing the following:
1. attempting a START RECOVERY
2. attempting a START NORECOVERY
3. ensuring the validity of your START procedure
4. ensuring your hardware, hardware code, and current software are functioning properly
5. reserving adequate disk space
Once you are ready to begin the recovery update, the following are required steps of the process. These
steps are a subset of an operating system update.
6. updating with the customized system load tape
7. restoring the backup tapes
8. returning to normal operation
CAUTION Do not attempt to use UPDATE to restore your system without reading the Backdating Your
System Appendix in HP e3000 MPE/iX System Software Maintenance Manual.
Backing up the System and Retaining the Current Configuration
Before updating your system, ensure that you have complete backup tapes. If up-to-date backups do not exist,
reschedule the update. The backups provide a method of restoring your data if difficulties arise during the
update.
You should also retain a hard copy of your system’s current configuration. If you use the CONFIG option with
UPDATE, UPDATE replaces the configuration files in the group CONFIG.SYS on disk with any that may exist in
the CONFIG.SYS on the system load tape (SLT). If you use this option, you can unintentionally replace your
system's current configuration files with the ones that UPDATE provides. In the event of an unintended
replacement, if you have a listing of your current configuration, you can easily regenerate your system's
current configuration.
Use SYSGEN to generate current configuration listings. For information on using SYSGEN, refer to
Chapter 4, “Using the System Generator (SYSGEN).”
The above information has provided you with an overview of the update process. If you are planning to update
your system, please follow the instructions in the HP e3000 MPE/iX System Software Maintenance Manual
which came with the system tapes.