TMSH0031E TMC and Audit file are on the same volume.
Article ID: 229363
Updated On:
Products
Issue/Introduction
Although the TMC and ADIT files are not on the same DASD volume the following message are displayed:
CHECK(CA_1,CA1_TMC_AUDIT_PLACEMENT)
SYSPLEX: TEST SYSTEM: XX
START TIME: 11/24/2021 23:44:31.202168
CHECK DATE: 20201208 CHECK SEVERITY: MEDIUM-DYNAMIC
Single Point of Failure Analysis for TMC and Audit
File Data Set Name Volume
----- -------------------------------------------- ------
TMC TMC file VOL001
Audit AUDIT file VOL001
IOSPF352I Volumes VOL001 with
TMC FILE and VOL001 with
AUDIT FILE share the same
physical control unit.
* Medium Severity Exception *
TMSH0031E Your CA 1 Tape Management Catalog (TMC) and your Audit file
are on the same volume.
Environment
Release : 14.0
Component : CA 1 Tape Management
Cause
The physical volume reside behind the same Disk Control Unit (CU).
Resolution
The SO16131 represents the enhancement to enable IBM's IOSSPOF service. With this feature, any Single Point of Failure detected by IBM's service will be reported on.
If a Single Point of Failure is detected, messages produced by the IOSSPOF
service will be issued.
Example:
IOSPF352I Volumes vvvvvv (unit-addr) with
BROADCOM.TMC and vvvvvv (unit-addr) with
BROADCOM.AUDIT share the same
physical control unit.
Single-Point-of-Failure is a service offered by IBM to identify if there is a single common piece of hardware that would affect access to two files.
sample - If a Control Unit is shared, and if the Control Unit fails for any reason then you would lose both the TMC and the Audit files. Which would then cause a LOSS of data until the Control-Unit is repaired.
In parallel, the LU03509 Apar has been written to permit to have a way to be more granular in the verification.
Additional Information
You will also need to install PTF LU09832.
The parameters are found in the HZSPRMxx member in SYS1.PARMLIB.
refer:
CHECK(CA_1,CA1_TMC_AUDIT_PLACEMENT),
PARM('SPOF=YES,CU_CHECKS=YES,SWITCH_CHECKS=NO'),
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