TPF : Support : Maintenance : TPFDF
SUBJECT: APAR NUMBER: PQ54576
REFERENCE: AREA: TPFDF CRUISE UTILITY
SEGMENT: UFHM0013 - RELEASE: TPFDF (C)
SEGMENT: UFHN0013 - RELEASE: TPFDF (C)
Pre-requisite APARs are (TPF only) :
FOR SEGMENT UFHM0013 (C) - REL TPFDF
PQ36341 PQ41433 PQ47054 PQ49946
FOR SEGMENT UFHN0013 (C) - REL TPFDF
To be applied in the order listed for each segment.
ABSTRACT OF PROBLEM
When using MRC (available with APAR PQ36341) during CRUISE cap-
tures, some of the MRC control data is not properly initialized
and copied to tape. This could possibly cause database cor-
COMMENTS ON PROBLEM
1. After CRUISE has completed a chain chase during capture
processing with multiple reference check (MRC), MRC control
data is compressed before writing the control data to tape.
The last ordinal of MRC control data is skipped during the
compression phase, causing incomplete control data to be
copied to tape. A database can be corrupted after restoring
a tape that contains missing MRC control data. Database cor-
ruption occurs because indexes and references may not be
updated during restore processing.
2. During the initialization of MRC records at the start of the
capture process, the last MRC control data ordinal is not
1. UFHN00 has been updated to copy all MRC control data
ordinals during the MRC control data compression phase of
CRUISE capture processing.
2. UFHM00 has been updated to initialize all the MRC records
before starting the capture process.
Related Segments Affected By This APAR.
Segments to be assembled or compiled:
Segments to be link-edited:
- For TPF: UFHM, UFHN.
- For ALCS: TPFDFH3.
-- END APAR PQ54576
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