Note:
2.34
TB
of
cache
reflects
raw
capacity
and
does
not
directly
correlate
to
usable
customer
capacity.
IBM
Virtualization
Engine
TS7740
CX6
(TS7740
Cache
Drawer
or
3956-CX6)
The
TS7740
Cache
Drawer
acts
as
an
expansion
unit
for
the
TS7740
Cache
Controller.
The
TS7740
Cache
Drawer
contains
16
DDMs
with
a
capacity
of
146
GB
each
for
a
total
of
2.34
TB
of
cache.
Note:
2.34
TB
of
cache
reflects
raw
capacity
and
does
not
directly
correlate
to
usable
customer
capacity.
The
TS7740
Cache
Controller
and
the
TS7740
Cache
Drawers
are
collectively
called
the
TS7740
cache
.
Two
types
of
TS7740
cache
configurations
are
available:
two-drawer
and
four-drawer
cache
configurations.
A
two-drawer
cache
configuration
consists
of
one
TS7740
Cache
Controller
attached
to
one
TS7740
Cache
Drawer,
while
a
four-drawer
cache
configuration
consists
of
one
TS7740
Cache
Controller
attached
to
three
TS7740
Cache
Drawers.
IBM
System
Storage
3952
Tape
Frame
F05
(3952
Tape
Frame
or
3952
F05)
The
3952
Tape
Frame
encloses
the
operational
components
described
above,
additional
components
such
as
routers,
and
power
distribution
units
for
connection
to
independent
power
sources.
The
3952
Tape
Frame
base
frame
contains
the
following
primary
components:
v
one
or
two
TS7740
Servers
v
one
TS7740
Cache
Controller
v
one
or
three
TS7740
Cache
Drawers
Attachment
to
the
3494
Tape
Library
Attachment
of
the
TS7700
Virtualization
Engine
to
the
3494
Tape
Library
involves
power
control,
interface
to
tape
drives
in
the
tape
library,
and
communication
with
the
Library
Manager
in
the
tape
library.
The
attachment
of
the
IBM
Virtualization
Engine
TS7700
Series
(TS7700
Virtualization
Engine)
to
the
IBM
TotalStorage
3494
Tape
Library
(3494
Tape
Library)
involves
the
following
connections:
Power
control
The
3494
Tape
Library
contains
power
sequencing
and
control
equipment
that
remotely
powers
on
and
off
the
TS7700
Virtualization
Engine.
This
is
the
normal
mode
of
power
control
for
the
TS7700
Virtualization
Engine.
Library
Manager
and
tape
drives
The
3494
Tape
Library
contains
an
internal
Library
Manager;
there
is
no
need
for
an
external
Library
Manager
as
there
is
for
the
IBM
System
Storage
TS3500
Tape
Library
(TS3500
Tape
Library).
Communication
and
control
signals
travel
among
the
Library
Manager,
the
TS7700
Virtualization
Engine,
and
the
tape
drives
within
the
3494
Tape
Library
that
the
TS7700
Virtualization
Engine
controls
through
a
local
area
network
(LAN).
Data
to
and
from
the
host
system
travels
between
the
TS7700
Virtualization
Engine
and
the
tape
drives
within
the
3494
Tape
Library
along
fibre
channel
connections.
A
fibre
channel
switch
routes
the
data
to
and
from
the
correct
tape
drive.
Chapter
3.
Operational
Characteristics
63
Summary of Contents for TotalStorage 3494 Tape Library
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