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

Chapter 3
System Startup Functions
Dumping System Memory and Secondary Storage
86
Table 3-4 summarizes system startup utilities with their more commonly used options.
SUBSET = ALL or
SUBSET = MEMORY
Default: SUBSET =
ALL
During a dump, this option indicates whether the contents of main
memory alone or main memory and secondary storage is dumped to
tape for later analysis. If the subset is not specified, it defaults to ALL
(main memory and secondary storage).
SYSSTART or
NOSYSSTART
Default: SYSSTART
On an INSTALL, UPDATE, START, or DUMP, this option determines whether
or not the system startup file is used during the current boot. If neither
SYSSTART nor NOSYSSTART is selected, SYSSTART (using the system
startup file) is the default. If the START parameter is not specified or
defaulted on an INSTALL, UPDATE, or DUMP, this parameter is ignored.
Table 3-4 Summary of System Startup Function
MPE/iX Utility MPE/iX Function (When To Use)
Spool
file
Recover
y
Permanent
User Files
START or START
RECOVERY
Starts system from disk. If RECOVERY is used
immediately after changing system
configuration, the system recovers restartable
jobs by using the previous system configuration
and ignores the new system configuration
Yes Retained
START
NORECOVERY
Starts system from disk. Use after changing
system configuration. Use to recover from
system hang or failure.
Yes
output
only
Retained
UPDATE or
UPDATE
NOCONFIG
Boots system from the SLT. Replaces system files
on disk with those from SLT. System uses
configuration files from disk. Use to update
current version of operating system while
maintaining current configuration. Use to
recover from system hang or failure.
Yes
output
only
Retained
UPDATE CONFIG Boots system from the SLT. Replaces system files
with those on the SLT. Replaces the
configuration files on disk (in the group
CONFIG.SYS) with those from the SLT.
Yes
output
only
Retained
INSTALL or
INSTALL START
Boots system from SLT. Replaces all system boot
files and base system files on the system volume
(LDEV 1) with the information on the SLT.
Replaces configuration files with SLT defaults.
Autoboots system after completing install. Use to
install a version of the operating system or to
recover from a disk crash or severe system
failure.
No Lost from
system disks.
User files
remain on
nonsystem
volumes.
Table 3-3 Utility Options (Continued)
Options Functions