System Startup, Configuration, and Shutdown Reference Manual (32650-90892)

78 Chapter3
System Startup Functions
Updating the Operating System
UPDATE process before using it as a recovery method. Understanding the UPDATE process
can reduce system operator and system manager errors and, therefore, reduce your
system’s downtime.
If you are using the UPDATE utility to replace a current version of the operating system
with a newer version, schedule the update for off-peak hours. The update procedure can
take up to four hours, depending on the system and the number of subsystem products you
have purchased. To reduce the time involved in ensuring the integrity of your backups,
schedule the UPDATE immediately after a full system backup.
Using the UPDATE Utility and Options
The command to invoke the UPDATE utility is UPDATE. The utility has two initial options,
CONFIG/NOCONFIG and START/NOSTART, with additional options if START is selected:
UPDATE[{ ;CONFIG [{ ;START
;NOCONFIG}] ;NOSTART } [options]]
where options are: [;LOGON=
acct ] [GROUP= cgn ]
[{ ;SINGLE-DISC [{ ;SINGLE-USER
;MULTI-DISC }] ;MULTI-USER }]
[{ ;SYSSTART
;NOSYSSTART }]
• The CONFIG/NOCONFIG option allows you to indicate whether you wish to replace the
configuration files in the group CONFIG.SYS on disk with any that may exist in the
group CONFIG.SYS on the tape. (The CONFIG.SYS group on a factory tape is empty;
however, a customer-generated tape may contain configuration data.)
• The START/NOSTART option allows you to choose whether or not to autoboot once the
update is complete. If you specify START as an option, or accept it as the default, the
remaining START options become available.
Refer to Table 3-4. for more information on the START options available for an update.
Enter the options in any order, and separate them from the command and other options by
a blank or semicolon.
Entering the command UPDATE without listing any options
ISL> UPDATE
is the same as specifying the following default options:
ISL> UPDATE NOCONFIG START GROUP=CONFIG LOGON=&
OPERATOR.SYS MULTI-DISC MULTI-USER SYSSTART
The UPDATE utility with its default options instructs the system to perform these tasks:
• update the existing operating system without replacing the configuration data files on
disk
• autoboot the system from disk after the update is completed
• use the configuration group CONFIG.SYS