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

134 Chapter5

Modifying Input/Output (I/O) Conﬁgurations

Using the IOCONFIG Utility

Deleting an I/O Path with IOCONFIG

The system manager or operator can delete an I/O path and all paths below it from the

conﬁguration with the DELETEPATH command. IOCONFIG will only delete a path if it is not

currently in use or if it does not have an associated device. If either is true when you issue

the DELETEPATH command, a warning message appears.

The syntax of the command is:

DELETEPATH [PATH =]

device path

Currently, the only paths that can be completely deleted are those using a single-ended

SCSI adapter.

Updating the Device Class Association Table with IOCONFIG

Many of the conﬁguration commands implicitly update one or more system reserved device

classes. For example, the ADEV command when used to conﬁgure a tape device, implicitly

adds the new device in TAPE device class. Also, these commands explicitly update one or

more device classes speciﬁed with the command.

The device class association information used by the ASSOCIATE and DISASSOCIATE

commands is stored in ASOCIATE.PUB.SYS. This ﬁle is built when the system manager

runs the program ASOCTBL.PUB.SYS. Therefore, after you have issued IOCONFIG

commands, it is a good idea to update the ﬁle ASOCIATE.PUB.SYS by running ASOCTBL.