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

Chapter 5
Modifying Input/Output (I/O) Configurations
Using the IOCONFIG Utility
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Using the IOCONFIG Utility
With the release of version C.55.00 of MPE/iX, system managers can now use a new utility, IOCONFIG, to
change the I/O configuration and implement the changes immediately without rebooting the system.
The IOCONFIG utility automatically updates SYSGEN’s base configuration. IOCONFIG can completely
replace the use of SYSGEN for device configuration, especially when you need to make configuration changes
immediately; that is, without rebooting the system. However, you should continue to use SYSGEN to
configure devices to have the changes take effect at the next reboot.
There is one occasion when you cannot use IOCONFIG in place of SYSGEN’s I/O Configurator: when the
current base configuration group is BOOTUP. IOCONFIG cannot modify configuration files in the BOOTUP
group, since these files are designed to maintain a backup copy of the configuration files used in the last
successful START NORECOVERY which includes INSTALL and UPDATE. Therefore, when BOOTUP is the current
base configuration group, you must use SYSGEN to make the configuration changes on the next START
NORECOVERY.
NOTE There is another new option for online device configuration introduced with Version C.55.00 of
MPE/iX. The system manager can use the I/O Configurator in SYSGEN, and then issue the
DOIONOW command to immediately begin making the changes online. This command is
described earlier in this chapter.
You may use IOCONFIG in one of two ways: interactively or non-interactively which is sometimes called
“command mode”.
To use IOCONFIG interactively, you issue the IOCONFIG command, without command parameters, at the CI
prompt. This starts the IOCONFIG utility, at which point you may enter any of the commands shown in
Table 5-6 at the special prompt. When you are through using IOCONFIG, you must explicitly exit the utility.