IBM 3745 Problem Determination Manual page 250

o
o
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IPL Problems (MSA Fields Definition)
MSA Fields Definition (IPL Information)
Field
g
Field
D
Refer to the 3745 Advanced Operations Guide for further details on other MSA
fields.
CUSTOMER 10:
3745-210
SERIAL NUMBER:
CCU-A SELECTED PROCESS MOSS OFFLINE BT X71:008000
RUN BYP-IOC-CHK STOP-CCU-CHK AC
IPL CCU-A PHASE 4
ENABLEDCA xxxxxxxxxxxxxxXx L xxxxxxxx
----------------------------------------------------------------------------------------- rn m/ dd/yy hh: m m
FUNCTION ON SCREEN:
FUNCTION PENDING:
Figure 8-3. MSA Example with IPL Information
CCU/scanner IPL information is displayed on line 4 for CCU-A, and on line 7 for
CCU-B.
A short time after successful completion of the IPL, these lines are cleared and
line 7 is filled by dashes plus the date and time.
CUSTQt.1ER 10: 3745-210 . SERIAL NUI1BER:
CCU-A SELECTED PROCESS MOSS OFFLINE BT X71:008000
RUN BYP-IOC-CHK STOP-CCU-CHK
At
IIPL CCU-AI I PHASE 41 ISTOP 1 ENABLED CA xxxxxxxxxxxxxxxx L xxxxxxxx
j j
B D
Figure 8-4. Fields of the IPL Information in the MSA
This picture shows the breakdown of the IPL information fields in line 4 (CCU A
fPL) or 7 (CCU B IPL).
IPL CCU-x (x
can
be Aor B):
A CCU IPL is started.
PHASE 1
PHASE 2
PHASE 3
PHASE 4
SUSPEND
Start of phase 1 (CCU test and initialization).
Start of phase 2 (load from the disk and start the control
program dump loader known as CLOP).
Start of phase 3 (load and initialize the scanners).
Start of phase 4 (load/dump from the host or disk, and initialize
the control program).
. An automatic IPL has been requested on a CCU, while IPL was
not yet completed on the other one. From a MOSS standpoint,
the latter CCU is frozen, until the other reaches phase
3
or 4,
depending on the moment the request was received.
All fields except 'F' and 'L' are frozen:
Chapter 8. IPL Problems (From Host or Disk)
8-15