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

132 Chapter5
Modifying Input/Output (I/O) Configurations
Using the IOCONFIG Utility
RANDOM
DEFAULT}]
Modifying a Device Class with IOCONFIG
The system manager or operator can modify a device class by adding or deleting one or
more devices in it or by renaming it using the MODIFYCLASS or MCLASS command. The
syntax of this command is identical to that of MCLASS in SYSGEN. The command syntax is
as follows:
MODIFYCLASS {[CLASS]=
classname }
[[NEWCLASS]=
classname ]
[[ALDEV]=
logical device # ,...]
[[DLDEV]=
logical device # ,...]
[[MODE =]{IN
OUT
CIO
NCIO
RANDOM
DEFAULT}]
Currently, the system allows any device in the system to belong to only one associated
class at any time. For example, if a device X belongs to a class Y and Y is associated to
some user, then the MODIFYCLASS command prevents you from adding X to another class Z
which is also associated to any user at the time.
Listing One or More Device Classes with IOCONFIG
The system manager or operator can list all device classes in the system, or one or more
specified device classes, with their configuration information using the LISTCLASS or
LCLASS command. When no parameter is used with this command, all device classes
currently configured in the system are listed. By providing the names of those device
classes with the CLASS keyword, you can view information about particular device classes.
The command syntax is as follows:
LISTCLASS [[CLASS]=
classname ,...]
[[DEST]= OFFLINE]
Deleting a Device Class with IOCONFIG
The system manager or operator can use the DELETECLASS or DCLASS command to delete a
device class that is not currently associated to a user. To disassociate the device class from
the user, the user must execute the DISASSOCIATE command at the Command Interpreter