Table
2.
Factory
default
configuration
switch
settings
(continued)
Switch
location
Position
Description
Factory
default
switch
setting
5
Remote
power
control
disable
On
Box
ID
switch
SW2
Rotary
Expansion
unit
ID
0
Configuration
switch
SW3
1
SCSI
ID
configuration
1
Off
2
SCSI
ID
configuration
2
Off
3
SCSI
ID
configuration
3
Off
4
Reserved
Off
Configuration
switch
SW4
1
SCSI-bus
split
control
Off
2
Rack
and
tower
LED
Off
3
Reserved
Off
4
Reserved
Off
Configuration
switch
SW5
1
Reserved
Off
2
Reserved
Off
3
Reserved
Off
4
Reserved
Off
Configuration
switch
SW1
settings
Configuration
switch
SW1
is
a
five-position
switch
that
is
mounted
on
the
ESM
and
is
accessible
from
the
rear
of
the
expansion
unit.
The
five
switch
positions
are
set
as
follows:
v
Switch
positions
1
through
4
-
Reserved
v
Switch
position
5
-
Remote
power
control
disable
When
switch
position
5
is
set
to
Off,
the
ESM
will
enable
the
power
supplies
when
the
termination
power
(TERMPWR)
is
active
in
any
external
SCSI
port.
This
means
that
the
expansion
unit
will
be
powered
on
and
off
automatically
when
the
host
server
is
powered
on
and
off
or
when
TERMPWR
is
disabled.
When
switch
position
5
is
set
to
On
(the
default
setting),
power
on
and
off
is
not
controlled
by
the
TERMPWR
signal,
but
by
the
power
on/off
switches
on
the
power
supplies.
Box
ID
switch
SW2
Box
ID
switch
SW2
is
a
10-position
rotary
switch
that
sets
the
expansion
unit
ID
using
values
0
through
9.
System-management
software,
such
as
IBM
Director
or
IBM
ServeRAID
Manager,
uses
this
ID
when
it
provides
data
and
alerts
for
the
expansion
unit.
Configuration
switch
SW3
—
SCSI
ID
configuration
switch
Configuration
switch
SW3
defines
the
SCSI
bus
ID
configurations.
The
user
should
prevent
a
SCSI
ID
conflict
in
a
specific
bus
mode.
SCSI
bus
mode
is
controlled
by
configuration
switch
SW4.
There
are
two
SCSI
buses
(bus
1
and
bus
2)
in
the
expansion
unit.
Each
bus
uses
seven
SCSI
ID
numbers.
Each
hard
disk
drive
within
the
expansion
unit
has
a
unique
SCSI
bus
and
ID
assignment,
based
on
its
physical
location
in
the
expansion
unit
and
the
setting
of
configuration
switch
SW3.
This
prevents
a
SCSI
ID
conflict
in
a
specific
bus
mode.
16
IBM
EXP400
Storage
Expansion
Unit
Type
1733:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide
Содержание EXP400 Type 1733
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