Management
Policies
(VTS
x)
window
(shown
in
The
Free
Storage
Threshold
,
measured
in
gigabytes
(GB),
defines
the
capacity
of
all
the
empty
stacked
volumes
in
the
VTS
or
TS7700
Virtualization
Engine
and
provides
a
warning
when
the
VTS
or
TS7700
Virtualization
Engine
is
running
low
on
free
storage,
A
threshold
is
provided
for
each
VTS
or
TS7700
Virtualization
Engine
installed
in
the
library
and
is
entered
in
GB.
The
default
value
is
600
GB.
The
VTS
Active
Data
window
displays
the
Free
Storage
Threshold
as
the
Free
Storage
Alarm
Level.
If
the
free
storage
drops
below
the
threshold
(alarm
level),
the
Library
Manager
signals
an
intervention-required
condition
to
notify
you
to
add
more
stacked
volumes.
The
Free
Storage
Threshold
value
specified
in
the
VTS/VE
Management
Policies
window.
The
number
of
stacked
volumes
required
to
store
the
Free
Storage
Threshold
depends
on
the
compression
of
data
(when
writing
from
the
tape
volume
cache
to
the
stacked
volume)
and
the
type
and
model
of
tape
drive
associated
with
the
VTS
or
TS7700
Virtualization
Engine
(3592
J1A
Tape
Drive,
3590
B1A,
E1A,
or
H1A
tape
drives).
v
The
3494
B18,
B10,
and
B20
VTSs
with
enhanced
ESCON
host
attachments
provide
compression
into
the
tape
volume
cache.
Therefore,
further
compression
when
writing
to
the
stacked
volume
is
unlikely,
and
the
capacity
of
a
J
media
stacked
volume
is
approximately
10
GB
for
3590
B1A
Tape
Drives,
20
GB
for
3590
E1A
Tape
Drives,
30
GB
for
3590
H1A
Tape
Drives.
v
The
capacity
for
a
K
media
stacked
volume
is
approximately
20
GB
for
3590
B1A
Tape
Drives,
40
GB
for
3590
E1A
Tape
Drives,
and
60
GB
for
3590
H1A
Tape
Drives.
v
The
capacity
for
a
JA
media
stacked
volume
is
approximately
300
GB
for
a
3592
J1A
Tape
Drive
or
a
3592
E05
Tape
Drive
emulating
a
3592
J1A
Tape
Drive.
v
The
capacity
for
a
JB
media
stacked
volume
is
approximately
700
GB
for
a
3592
J1A
Tape
Drive
or
a
3592
E05
Tape
Drive
emulating
a
3592
J1A
Tape
Drive.
v
The
capacity
for
a
JJ
media
stacked
volume
is
approximately
60
GB
for
a
3592
J1A
Tape
Drive
or
a
3592
E05
Tape
Drive
emulating
a
3592
J1A
Tape
Drive.
Figure
149.
VTS
Management
Policies
Window
(by
Pools)
Chapter
6.
Advanced
Operating
Procedures
247
Summary of Contents for TotalStorage 3494 Tape Library
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