IBM TotalStorage 3494 Tape Library, Operator'S Manual

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Chapter 8. Problem Determination Procedures
This chapter describes how to determine when a problem has occurred in the 3494
Tape Library and the actions necessary to resolve the problem.
See Table 24 for quick reference to particular conditions.
Quick Reference to Problem Determination Procedures
Table 24. Quick Reference to Problem Determination Procedures
Conditions Reference
Library Manager failures in a DFSMS/MVS
®
(z/OS) environment (includes 3494 HA1
Option switchovers)
“Library Manager Failure in DFSMS/MVS
(z/OS)” on page 435
Library Manager failures in an MVS/BTLS
environment (includes 3494 HA1 Option
switchovers)
“Library Manager Failure in MVS/BTLS” on
page 439
Reported by a host console message “DFSMS/MVS System-Managed Tape
Messages” on page 443
Intervention required on Library Manager
System Summary or SNMP OPINT trap
message
“Intervention-Required Conditions and
Actions” on page 458
Disruption of services or physical damage to
a site with a VTS
“VTS Storage Management Class Warning
Messages” on page 507 and “VTS Recovery
Actions” on page 508
Export/Import List Volume status codes in
the status file
Appendix B,
″
VTS Export and Import
Advanced Function
″
When a problem occurs in the 3494 Tape Library or associated tape subsystems,
completion of one or more operations may not be possible. This topic provides
information on how to identify problems, what is their significance to continuing
operations in the 3494 Tape Library, and what actions to take for recovery.
Several symptoms indicate that a problem occurred with the 3494 Tape Library or
associated tape drives. These symptoms are in the following general categories:
v One or more jobs that require volumes in the 3494 Tape Library are not
progressing or completing as expected. The following are possible causes:
– The workload demand on the 3494 Tape Library exceeds its capability. For
example, the number of requests to mount volumes on tape drives in a 3494
Tape Library received in a period exceeds the number that can process during
that period. The result is that the requests stay in the Library Manager queue
for a longer period before being performed. Although this is not a problem
with the 3494 Tape Library, if this is occurring on a regular basis, workload
balancing must be addressed.
– The failure of a component in the 3494 Tape Library is causing degraded
performance. Library operations are performed but are slower to complete
because of the failure. For example, when one of the two grippers fails, all
operations continue with the other gripper but take longer to complete than
when both grippers are functional. Service is required to correct the problem.
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