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
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
failures
in
an
MVS/BTLS
environment
(includes
3494
HA1
Option
switchovers)
Reported
by
a
host
console
message
Intervention
required
on
Library
Manager
System
Summary
or
SNMP
OPINT
trap
message
Disruption
of
services
or
physical
damage
to
a
site
with
a
VTS
and
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.
©
Copyright
IBM
Corp.
2001,
2008
433
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