IBM iSeries 270 Service Manual page 588

Sb2 and sb3 hardware

Hide thumbs Also See for iSeries 270:

Table of Contents

Cc—System Card

bb—System Board

Continue with the next step for IOA and device address information.

Unit (Device) Address Definitions are explained in an "abcd efgh" format. For example, if the unit

address is 0001 00FF, the address relates to the "abcd efgh" format as follows:

Figure 3. Example of Unit (Device) Address Definitions

The characters "abcd efgh" can have different meanings, depending on the subsystem that reports

the problem. However, they define the information that is contained in the unit (device) address as

Table 2. Character definitions

Disk, tape, or optical

Note: If the failing item or procedure that sent you here indicates that the I/O Adapter is the failing

item, but you only have a device address, convert the device address into an I/O Adapter address by

making the last 7 digits FFFFFFF so that the address becomes xFFFFFFF, where x is the I/O adapter

Note: If the unit (device) address appears as FFFF FFFF, the address cannot be determined.

This ends the procedure.

10. OS/400 communication-diagnostic panels that are displayed by the commands VFYCMN, WRKPRB,

and ANZPRB use the following address format:

Hardware (Remove and Replace; Part Locations and Listings)

Communications

Show Quick Links

Table of Contents