Addresses - Model 820 - IBM iSeries 270 Service Manual

Possible
failing
Position component
D14, D20 Disk unit
Addresses — Model 820
For use by authorized service providers.
Use the address to find the location. Then go to "Locations — Model 820" on page 248 to find additional
information.
Table 1. IOP, IOA, and device address information for Model 820
Position (listed in IOA
assignment order)
MB1
MB1
C06
C05
C04 (IXS capable position)
C04 (IXS capable position)
C04 (IXS capable position)
C03 (empty if IXS in C04)
C03 (empty if IXS in C04)
C03 (empty if IXS in C04)
C02
C02
C02
DSA (BBBBCcbb) Unit address
The disk unit has the xy0F00FF (where x is the same as the first character of the
same DSA as the IOP xFFFFFFF IOA Unit Address and y is I/O bus 0, 1 or 2. Storage
controlling the Storage IOA I/O buses begin with 0 and are numbered from the tailstock
IOA. toward the middle of the card. Find the storage IOA with the
same DSA and xFFFFFFF address, then trace the I/O bus cable
to determine if the position is D14 or D20.)
Possible Failing
Component
Embedded IOP
Service Processor
Communication, workstation
IOA
Storage IOA
IOP
Storage IOA
Communication, workstation
IOA
IOP
Storage IOA
Communication, workstation
IOA
IOP
Storage IOA
Communication, workstation
IOA
DSA (BBBBCcbb)
Note: IOA and device
DSA's will not follow the
rules below if the IOA is
manually reassigned after
IPL.
0001-10-00
0001-70-00
0001-10-00
0001-10-00
0001-13-00
0001-10-00
0001-10-00
0001-14-00
The IOA has the same DSA
as the first IOP found in the
following list: C04, MB1.
The IOA has the same DSA
as the first IOP found in the
following list: C04, MB1.
0001-16-00
The IOA has the same DSA
as the first IOP found in the
following list: C03, C04,
MB1.
The IOA has the same DSA
as the first IOP found in the
following list: C03, C04,
MB1.
Unit Address
FFFFFFFF
FFFFFFFF
E1FFFFFF
2FFFFFFF
FFFFFFFF
3FFFFFFF
E3FFFFFF
FFFFFFFF
4FFFFFFF
E4FFFFFF
FFFFFFFF
6FFFFFFF
E6FFFFFF
Analyze hardware problems
327