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SYSGEN AND SYSGEN-RELATED PROCEDURES
Performing a full sysgen
When to use a full sysgen
Backing up user files
Choosing a format command
Full sysgen procedure summary
4-4
In the full sysgen procedure, all system disks are formatted and
the operating system software is installed on the system disks. A
full sysgen is normally performed in the following situations:
•
A new system is installed.
•
A system disk is replaced.
•
Read errors or other disk problems have occurred.
•
When required for a specific system or patch.
CAUTION: If the disk being formatted contains user files, be
sure to back up those files before formatting because they will
be deleted from the disk.
Sysgen media
A full sysgen can be performed from tape, cartridge, or host.
The step-by-step procedures provided in the following section
are for a full sysgen from any medium.
This table lists the differences between the FORMAT and ERASE
commands used for formatting the system disks prior to sysgen.
FORMAT command
•
•
•
You must use when:
•
•
•
•
1. Back up any user files residing on the disks to be formatted.
2. Load the sysgen processor into the main memory.
3. Use either the FORMAT or the ERASE command to format
the system disks. Refer to the comparison table above and
the "Formatting a system disk" or "Erasing a system disk"
procedure later in this chapter.
4. Install the new operating system software (OSS) using the
SYSGEN command.
a. Define the system configuration
b. Load the operating system software
c. Apply system patches (automatic)
d. Apply any OSS or user patches.
Deletes all files except the
MBAIS file
Performs a sector check
Flags any new bad block
areas
replacing a system disk
installing an additional disk
into the system
read errors or other disk
problems have occurred
verifying the integrity of the
system disk and the MBAIS
data.
XEROX 4635 LASER PRINTING SYSTEM—SYSTEM GENERATION GUIDE
ERASE command
•
Saves both the MBAIS
and bad block files.
•
Does not perform a
new sector check.
Use if you are confident
of your system disk
integrity.
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