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

Chapter 5 131
Modifying Input/Output (I/O) Configurations
Using the IOCONFIG Utility
[[ID]= product number ]
[[TYPE]=
device type ]
[[CLASS]=
classname ,...]
[[DEST]=OFFLINE]
Deleting a Device with IOCONFIG
The system manager or operator may delete a device from the configuration using the
DELETEDEVICE or DDEV command. A device is considered to be completely deconfigured
when all its system-related resources are recovered. DDEV, at this time, can only
deconfigure two kinds of devices completely: network printers and disks that are attached
to single-ended SCSI adapters.
The syntax of the DDEV command is identical to that of SYSGEN’s DDEV command in IO
level. The command syntax is as follows:
DELETEDEVICE {[LDEV =]#/#,#,...}
[[ID =]
deviceid ]
[[TYPE =]
devicetype ]
[[CLASS =]
classname ]
Adding a Device Class with IOCONFIG
To create a new device class in the system, the system manager or operator uses the
ADDCLASS or ACLASS command. The syntax of the ACLASS command is identical to that of
ACLASS in SYSGEN. All devices that you designate as members of the class (using the
LDEV parameter) must be configured before issuing this command.
NOTE With the release of version C.55.00 of MPE/iX, the maximum number of
devices that you can configure has substantially increased. When there is a
large number of configured devices, you may notice a slight delay in system
response as you add more. For example, when the number of devices
configured exceeds approximately 2,000, the delay will be evident. It is not,
however, indicative of a system problem.
The syntax of the ADDCLASS command is as follows:
ADDCLASS {[CLASS =]
classname }{[LDEV =]#/#,#,...}
[[MODE =]{IN
OUT
CIO
NCIO