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addition, IPCS can be used to format the in-storage LOGREC buffers while
analyzing a dump.
31.8 SYSLOG
All system and job related messages along with all operator commands are
written to the SYSLOG JES spool data set. SDSF (under TSO) can be used to
view the SYSLOG to aid in problem determination.
31.9 DFSMS/MVS Diagnosis
DFSMS/MVS provides many tools to assist a system programmer diagnose
problems. Each component provides its own diagnosis documentation.
31.9.1 DFSMSdfp
DFSMSdfp provides many diagnostic aids that can be used by a system
programmer when diagnosing problems. The
DFSMS/MVS DFSMSdfp Diagnosis
Reference
, LY27-9606 provides information on reading dumps, running GTF
traces, SMS traces, error codes, and more for each DFSMSdfp component. The
DFSMS/MVS DFSMSrmm Diagnosis Guide
, SY27-9615 provides instructions for
diagnosing errors such as building keyword strings to search for known
component failures.
31.9.1.1 Analyzing Catalogs for Errors and Synchronization
Catalog entries might become unsynchronized, so that the information about the
attributes and characteristics of a data set are different in the BCS, VVDS, and
VTOC. These differences may make a data set inaccessible or otherwise
unusable.
To analyze a catalog for synchronization errors, you can use the Access
Methods Services (AMS) DIAGNOSE command. This command will analyze the
content of catalog records in the BCS and VVDS, and compare VVDS information
with the DSCB information in the VTOC. DIAGNOSE will also check for invalid
data or invalid relationships between entries. For more information concerning
the DIAGNOSE command, refer to
DFSMS/MVS Access Methods Services for ICF
,
SC26-4906. For more information on backup and recovering catalogs, catalog
diagnostic information, using DIAGNOSE output for analysis, refer to
Managing
Catalogs
, SC26-4914.
31.9.1.2 Catalog Recovery
The following is from Flash 9741 ICF Catalog Recovery
There is a dependency on catalog availability for continued operation of online
systems, batch processing, and time sharing. A catalog outage can be extremely
disruptive.
There are several utilities available from IBM that can be used to back up and
reload a catalog. The user could choose from:
•
IDCAMS EXPORT/IMPORT
•
DFSMSdss logical DUMP/RESTORE
•
DFSMShsm BACKDS/RECOVER
476 VSE to OS/390 Migration Workbook