Table
28.
Intervention-Required
Conditions
(continued)
Intervention-Required
Condition
Resolution
Actions
Message
OP0154
Pool
nn
has
stacked
volumes
of
wrong
(opposite)
media
class.
(VTS
z)
Probable
Cause
The
VTS
has
detected
the
following
condition:
The
storage
pool
has
stacked
volumes
of
wrong
(opposite)
media
class.
For
example:
The
pool
could
be
defined
as
a
3590
media
class
and
it
has
3592
stacked
volumes.
1.
Contact
your
System
Administrator.
2.
Perform
one
of
the
following
sequences
of
steps:
a.
At
the
Library
Manager
console,
select
the
Commands
menu.
b.
Select
System
Management.
c.
In
the
Stacked
Volume
Pool
Properties
window,
change
the
media
class
to
the
correct
option.
or
a.
At
the
Library
Manager
console,
select
the
Commands
menu.
b.
Select
System
Management.
c.
In
the
Move/Eject
Stacked
Volumes
window,
move
the
stacked
volumes
to
a
pool
of
the
correct
media
class.
Message
OP0160
Above
threshold
for
uncopied
data
in
cache,
throttling
possible
(VTS
z)
Probable
Cause
The
amount
of
data
in
the
VTS’s
cache
that
has
not
been
copied
to
physical
tape
has
crossed
a
threshold.
Once
the
threshold
has
been
crossed,
the
VTS
begins
applying
a
delay
in
responding
to
host
write
commands
which
would
allow
the
VTS
to
direct
more
of
its
resources
to
the
task
of
copying
data
to
physical
tapes
and
preventing
an
overrun
of
the
cache.
That
delay
can
impact
host
jobs
using
the
VTS.
This
condition
is
indicated
when
the
amount
of
data
to
copy
exceeds
the
threshold
for
the
installed
cache
capacity
for
5
consecutive
sample
periods
(amount
of
data
to
copy
is
sampled
every
30
seconds).
The
threshold
is
set
to
1000GB
for
a
1.72GB
configuration,
700GB
for
an
864GB
configuration
and
225GB
for
a
432GB
configuration.
Note:
This
message
must
be
enabled
by
the
IBM
service
representative.
1.
This
condition
can
be
encountered
during
a
period
of
heavy
write
workload
to
the
VTS.
2.
If
it
is
encountered
in
times
of
light
workload,
it
may
be
an
indication
of
an
inadequate
number
of
back-end
drives
on
the
VTS.
Notify
your
system
administrator.
496
3494
Tape
Library
Operator
Guide
Summary of Contents for TotalStorage 3494 Tape Library
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