IBM iSeries 270 Service Manual page 373

Position
C01 (IXS capable position)
C02 (empty if IXS in C01)
C02 (empty if IXS in C01)
C03
C03
C03
C03
C04
C04
C04
C06
C07
C07
C08
C08
C08
D01, D07
Possible failing item
IOP
Storage IOA
Communication, workstation
IOA
IOP
Storage IOA
Communication, workstation
IOA
IXS attached IOA
Storage IOA
Communication, workstation
IOA
IXS attached IOA
IOP
Storage IOA
Communication, workstation
IOA
Storage IOA
Communication, workstation
IOA
IXS attached IOA
Disk unit
DSA (BBBBCcbb)
Note: IOA and device DSAs
will not follow the rules
below if the IOA is manually
reassigned after IPL.
xxxx-20-00
xxxx-20-00
xxxx-20-00
xxxx-24-00
xxxx-20-00
xxxx-20-00
xxxx-20-00
The IOA has the same DSA
as the first IOP found in the
following list: C03, C01.
The IOA has the same DSA
as the first IOP found in the
following list: C03, C01.
The IOA has the same DSA
as the first IOP found in the
following list: C03, C01.
yyyy-20-00
yyyy-20-00
yyyy-20-00
yyyy-20-00
yyyy-20-00
yyyy-20-00
The disk unit has the same
DSA as the IOP controlling
the storage IOA.
Unit address
FFFFFFFF
2FFFFFFF
E2FFFFFF
FFFFFFFF
4FFFFFFF
E4FFFFFF
E004FFFF
6FFFFFFF
E6FFFFFF
E006FFFF
FFFFFFFF
2FFFFFFF
E2FFFFFF
6FFFFFFF
E6FFFFFF
E006FFFF
xy0100FF (where x is the
same as the first character
of the xFFFFFFF IOA Unit
Address and y is I/O bus 0,
1, 2, or 3. Storage IOA
buses begin with 0 and are
numbered from the tailstock
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
D01 or D07.)
Analyze hardware problems
361