volumes
starting
at
volser
J10000
and
ending
at
volser
J29999.
The
database
overlap
search
will
cause
the
Library
Manager
to
reject
this
insertion
request
because
of
a
sensed
overlap
as
the
search
sequences
past
J19ZZZ
to
J1A000,
J1A001,
etc.
The
operator
can
avoid
this
situation
by
inserting
the
logical
volumes
in
two
ranges;
in
this
example,
J10000-J19999
and
J20000-J29999.
Careful
planning
of
both
physical
and
logical
volser
assignment
can
help
prevent
such
situations.
Consider
one
of
the
following
methods
to
assign
volsers:
v
Use
different
characters
in
initial
position
for
different
media
types
and
VTS
partitions;
for
example,
certain
characters
can
designate
physical
stacked
volumes
in
VTS
1,
other
characters
can
designate
logical
volumes
in
VTS
1,
yet
other
characters
can
designate
physical
stacked
volumes
in
VTS
2,
etc.
v
Use
the
same
format
for
all
volsers,
both
physical
and
logical,
and
ensure
that
all
volsers
consistently
use
either
all
numeric
or
all
alphabetic
characters
in
each
character
position.
For
instance,
use
only
alphabetic
characters
in
the
first
three
positions
and
only
numeric
characters
in
the
last
three
positions.
Cartridge
Placement
When
you
place
cartridges
into
the
3494
Tape
Library,
you
can
improve
performance
by
following
these
guidelines:
v
During
initial
loading
of
cartridges,
cluster
the
cartridges
around
the
tape
drives
in
which
will
read
them.
v
For
Inventory
Update
Inserts,
place
cartridges
as
near
as
possible
to
the
tape
drives
on
which
you
intend
to
issue
mounts
for
those
volumes.
v
Place
cartridges
to
be
used
as
stacked
volumes
for
a
particular
VTS
in
cells
close
to
those
drives
associated
with
the
VTS.
Initial
Volume
Inventory
Upload
After
the
3494
Tape
Library
completes
all
the
initialization
operations
(including
teach
and
inventory)
and
enters
the
Online
state
for
the
first
time,
the
host
software
requests
an
upload
of
the
volume
inventory.
The
information
from
the
Library
Manager
database
is
uploaded
to
the
attached
hosts
before
host
applications
can
use
the
3494
Tape
Library.
The
process
to
upload
the
information
requires
no
operator
action.
Host
Operation
Control
The
host
operation
control
of
the
3494
Tape
Library
is
operating
system-dependent.
Because
the
3494
Tape
Library
operates
under
a
variety
of
host
operating
systems,
you
must
be
familiar
with
the
operating
system
for
your
3494
Tape
Library
and
the
required
protocol.
For
more
information
about
the
host
operating
systems,
see
the
IBM
TotalStorage
3494
Tape
Library
Introduction
and
Planning
Guide
and
″
Related
Information
″
.
Chapter
3.
Operational
Characteristics
95
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