Choice
of
Volsers
Upon
Logical
Volume
Insertion
When
inserting
a
logical
volume
into
the
3494
Tape
Library,
the
following
items
must
be
specified:
v
starting
volser
v
ending
volser
v
VTS
partition
to
which
the
volsers
are
assigned
v
media
type
The
3494
Tape
Library
determines
the
number
of
volumes
to
insert
from
the
starting
and
ending
volsers
specified.
For
example,
a
starting
volser
of
AAA000
and
an
ending
volser
of
AAB999
will
insert
2000
logical
volumes.
The
volumes
inserted
in
this
example
are:
v
AAA000
v
AAA001
through
AAA999
v
AAB000
v
AAB001
through
AAB999
Note
the
following
in
the
preceding
example:
1.
The
format
of
the
starting
and
ending
volsers
are
the
same
(that
is,
the
characters
at
the
same
position
in
both
the
starting
and
ending
volsers
are
of
the
same
type,
either
alphabetic
or
numeric).
This
must
be
true
for
the
volsers
to
be
valid.
If
the
starting
volser
were
AAA000
and
the
ending
volser
were
AAAB01,
this
combination
would
be
invalid
because
the
4th
character
in
each
are
not
of
the
same
type.
2.
Volsers
are
created
by
incrementing
numeric
characters
numerically
and
alphabetic
characters
alphabetically.
This
matches
how
physical
cartridge
volser
labels
are
ordered.
The
3494
Tape
Library
checks
whether
any
volsers
of
a
different
media
type
or
VTS
partition
fall
within
the
range
entered
for
the
logical
volumes
to
be
inserted.
If
any
volsers
do
overlap,
the
logical
volumes
are
not
inserted
and
the
Library
Manager
console
displays
the
following
message:
The
logical
volume
range
entered
overlaps
existing
volumes
of
a
different
media
type
or
partition.
Reenter
the
range
so
that
it
doesn’t
conflict.
Note
that
an
overlap
is
allowed
if
the
redundant
volsers
are
in
the
same
VTS
partition
and
and
are
of
the
same
media
type.
In
this
case,
the
existing
volsers
are
not
reinserted.
The
3494
Tape
Library
performs
the
overlap
check
by
examining
the
Library
Manager
database.
However,
the
database
search
does
not
increment
alphabetic
characters
alphabetically
and
numeric
characters
numerically
as
described
above.
Rather,
the
search
increments
each
character
numerically
from
″
0
″
and
then
alphabetically
from
″
A
″
.
In
the
preceding
example,
the
search
would
start
at
AAA000
through
AAA009
and
then
increment
to
AAA00A
through
AAA00Z.
The
search
would
then
sequence
as
follows:
AAA010
through
AAA019,
AAA01A
through
AAA01Z,
AAA020
through
AAA029,
AAA02A
through
AAA02Z,
etc.
In
summary,
while
a
set
of
logical
volumes
to
be
inserted
might
not
actually
overlap
existing
volsers,
the
insertion
might
fail
because
the
check
will
indicate
an
overlap.
As
an
example,
assume
a
set
of
stacked
physical
volumes
exists
in
the
3494
Tape
Library
and
has
volsers
J1A001
through
J1A500
assigned,
corresponding
to
a
set
of
500
physical
volumes.
The
operator
attempts
to
insert
20,000
logical
94
3494
Tape
Library
Operator
Guide
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