Disk Unit Problem Isolation Procedures; Du-Pip1; Du-Pip3 - IBM Application System/400 Service Information

Disk Unit Problem Isolation
Procedures
DU-PIP1
This procedure determines the system reference
code (SRC) to be used to isolate the problem.
1
Perform an initial program load (IPL) to
dedicated service tools (DST) by dOing the
following:
a. Power off the system if it is powered on
(see "Power off" on page 5-2).
b. Select IPL Type A and Mode M (see
"Selecting I PL and Mode" on
page 5-2).
c. Power on the system (see "Power on"
on page 5-2).
Does a system reference code (SRC)
appear on the control panel?
No Yes
+
Go to step 4 of this procedure.
2
Does the Display Missing Disk Units
display or the Suspend Missing Disk Units
display appear on the console (see ''VLlC
PIP Display Examples" on page 3-30)?
No Yes
+
If all the reference codes are 0000,
go to "VLlC-PIP11" on page 3-24
and use cause code 0002. If any
of the reference codes are not
0000, go to step 4 of this procedure
and use the reference code that is
not 0000.
Note: Use the characters in the
Type column to find the correct ref-
erence code table.
3
Look at all the error logs by selecting the
Error log utility option under DST (see
"System Tools" in the Service Functions
User's Guide).
Is an SRC logged as a result of this IPL?
3-2
AS/400 9401 Service Information
Yes No
+
The problem cannot be isolated any
more. Use the original SRC and
exchange the parts, starting with
the highest probable cause of
failure (see the failing item list for
this reference code in Chapter 2 of
this guide). If the failing item list
contains FI codes, see "Failing Item
(FI) Code Table" on page 2-55. If
you need help in finding disk unit
part number locations in the
system, see "Disk Unit FRU
Locations" on page 3-7.
This ends the procedure.
4
Record the SRC on the Problem Summary
Form (see Appendix D, "Problem Summary
Form" on page D-1).
Is the SRC the same one that sent you to
this procedure?
Yes No
+
Go to Chapter 2, "Unit Reference
Codes" on page 2-1. Use the new
SRC to correct the problem.
This ends the procedure.
5
The problem cannot be isolated any more.
Use the original SRC and exchange the
parts, starting with the highest probable
cause of failure (see the failing item list for
this reference code in Chapter 2 of this
guide). If the failing item list contains FI
codes, see "Failing Item (FI) Code Table"
on page 2-55. If you need help in finding
disk unit part number locations in the
system, see "Disk Unit FRU Locations" on
page 3-7.
This ends the procedure.
DU-PIP3
This procedure determines the system reference
code (SRC) to be used to isolate the problem and
to determine the failing device.
Ensure that after any disk unit is installed, the
address jumpers are removed from the old disk