The
switch
positions
configure
the
SCSI
ID
assignment.
Switch
positions
1,
2,
and
3
are
set
to
Off
for
rack
enclosures.
Rack
enclosure
SCSI
IDs
are
identified
from
left
to
right.
The
SCSI
addresses
are
0,
1,
2,
3,
4,
5,
6,
8,
9,
10,
11,
12,
13,
14.
Switch
positions
1,
2,
and
3
are
set
to
On
for
a
tower
enclosures.
The
enclosure
unit
is
rotated
counter-clockwise
90
degrees
to
be
converted
to
a
tower
unit.
In
this
case,
the
SCSI
addresses
are
reversed
and
they
are
0,
1,
2,
3,
4,
5,
6,
8,
9,
10,
11,
12,
13,
14
from
top
to
bottom.
All
other
switch
settings
are
reserved.
Numbered
stickers
for
the
front
of
the
drives
are
provided
so
you
can
label
the
drives
with
the
SCSI
IDs.
v
Switch
position
1
-
SCSI
ID
configuration
1
This
switch
position
(default
is
Off)
is
used
to
configure
SCSI
ID
assignment
with
a
combination
of
SCSI
ID
switch
positions
2
and
3.
v
Switch
position
2
-
SCSI
ID
configuration
2
This
switch
position
(default
is
Off)
is
used
to
configure
SCSI
ID
assignment
with
a
combination
of
SCSI
ID
switch
positions
1
and
3.
v
Switch
position
3
-
SCSI
ID
configuration
3
This
switch
position
(default
is
Off)
is
used
to
configure
SCSI
ID
assignment
with
a
combination
of
SCSI
ID
switch
positions
1
and
2.
v
Switch
position
4
-
Reserved
This
switch
position
is
reserved
and
set
to
Off
(the
default).
Table
3.
SCSI
ID
configuration
matrix
SW
position
Bus
Config
L-segment
R-segment
1
2
3
Slot
1
Slot
2
Slot
3
Slot
4
Slot
5
Slot
6
Slot
7
Slot
8
Slot
9
Slot
10
Slot
11
Slot
12
Slot
13
Slot
14
Off
Off
Off
Rack
0
1
2
3
4
5
6
8
9
10
11
12
13
14
On
On
On
Tower
14
13
12
11
10
9
8
6
5
4
3
2
1
0
Configuration
switch
SW4
Configuration
switch
SW4
controls
the
SCSI
bus
configuration.
When
switch
position
1
is
set
to
Off
(default
is
Off),
the
expansion
unit
configuration
is
set
as
a
single
SCSI
bus
mode.
When
switch
position
1
is
set
to
On,
the
expansion
unit
configuration
is
set
as
a
dual
SCSI
bus
(split
bus)
mode.
v
Switch
position
1
-
SCSI-bus
split
control
This
switch
position
controls
the
SCSI
bus
mode.
When
the
switch
position
is
set
to
Off
(default
is
Off),
the
expansion
unit
is
configured
as
a
single
SCSI
bus.
When
this
switch
position
is
set
to
On,
the
expansion
unit
is
configured
as
a
dual
or
split
SCSI
bus.
v
Switch
position
2
-
Rack-to-tower
LED
mode
Set
switch
position
2
to
Off
(default
is
Off)
for
rack
enclosures
and
to
On
for
tower
enclosures.
These
settings
control
the
power
and
fault
LEDs
on
the
midplane,
which
are
exchanged
from
one
orientation
to
the
other.
In
a
tower
enclosure,
the
top
LED
is
green
and
in
a
rack
enclosure,
the
left
side
LED
is
green.
Note:
If
you
are
installing
the
expansion
unit
in
a
tower
enclosure,
see
the
Rack-to-Tower
Conversion
Kit
Installation
Instructions
for
configuration
switch
settings
and
labeling
information.
v
Switch
position
3
-
Reserved
This
switch
position
is
reserved
and
set
to
Off
(the
default).
Chapter
2.
ESM
configuration
switches
17
Summary of Contents for EXP400 Type 1733
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