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

Chapter 5 129
Modifying Input/Output (I/O) Configurations
Using the IOCONFIG Utility
To use IOCONFIG in command mode, you enter IOCONFIG followed by a single command
passed as an INFO string at the CI prompt. For example, you might want to list the
devices or device classes in the current configuration without executing any other
command. To do so, you would enter:
:IOCONFIG "lc"
Device and device class configuration with the IOCONFIG utility is just like SYSGEN’s.
You can list device and device class information, or add and delete a device or a device
class. You can also modify an existing device class to add or delete devices in the class, or to
rename the class. All commands take effect immediately. As a side-effect, those commands
that update the configuration also update the current SYSGEN boot configuration.
Adding a Device with IOCONFIG
To configure a tape drive, disk or a system printer into the system, the system manager or
operator uses the ADDDEVICE or ADEV command. The syntax of the command is identical to
that of SYSGEN’s ADEV command in IO level, except that the ID parameter is optional.
The command syntax is as follows:
ADDDEVICE { [LDEV =] #/#,#,...}{ [PATH =]
devicepath }
[[ID =]
productid ] [[RSIZE =] recordsize ]
[[OUTDEV =]
outputdevice ]
Table 5-6. IOCONFIG Commands
Command Abbreviations Description
ADDDEVICE adev, ad Adds a device from the physical configuration to the active
configuration.
LISTDEVICE ldev, ld Lists the active device configuration.
DELETEDEVICE ddev, dd Deletes a device from the active configuration.
ADDCLASS aclass, ac Adds a device class to the active configuration.
MODIFYCLASS mclass, mc Modifies a device class in the active configuration.
LISTCLASS lclass, lc Lists the active device class configuration.
DELETECLASS dclass, dc Deletes a device class from the active configuration.
ADDPATH apath, ap Adds an intermediate path to the active configuration.
LISTPATH lpath, lp Lists I/O paths for the active configuration.
DELETEPATH dpath, dp Deletes an I/O path from the active configuration.
REDO redo Re-executes the command previously executed.
HELP he, h Displays information about all commands or about the
specific command entered following the HELP
EXIT ex, e Exits IOCONFIG.