Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)

Chapter 4 59
Dynamic Configuration and DTS Shutdown/Restart
Dynamic Configuration
NMCONFIG and NMCONFIX Files
Dynamic Configuration uses both files NMCONFIG.PUB.SYS and
NMCONFIX.PUB.SYS to manage the devices created by the DTS
subsystem. When users wish to make any dynamic change, NMMGR
will be used to modify the configuration in NMCONFIG.PUB.SYS. When
DTCCNTRL is invoked, either within or from outside of NMMGR,
NMCONFIG will be compared to NMCONFIX and the desired changes
will be made to the system configuration. When the operation has
completed successfully, the changes will be written to NMCONFIX. The
configuration in NMCONFIX will always match the actual
configuration of the DTS subsystem.
If any errors are encountered, then information will be saved in the
NMCONFIG file that will allow DTCCNTRL to be re-invoked to
complete the changes at a later time. If an operation is partially
successful, then those changes that are successful will be written to
NMCONFIX. For example, if you delete two ldevs and the second ldev
can't be deleted because it is in use, then DTCCNTRL will save
information that will allow the second ldev to be deleted once the device
is no longer in use.
CAUTION If ANY other configuration file is copied to NMCONFIG.PUB.SYS or
NMCONFIX.PUB.SYS then dynamic configuration will be disabled until
a DTS shutdown and restart is done or the system is rebooted. This
includes other files from the same system or files copied from other
systems.
If there is some operation that fails, and you wish to undo the change,
you can use NMMGR to change the appropriate screens back to what
they were and then invoke DTCCNTRL.