IBM 39M5657 User Guide - Page 23

Setting, Jumpers, Switch, Supplying, TERMPOWER, Drive

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Set the SCSI ID The SCSI ID can be set in one of two ways: v By placing jumpers on the SCSI ID connector v By using a SCSI ID switch that is connected to the SCSI ID connector Setting the SCSI ID with Jumpers The SCSI ID can be set on the drive by installing 2 mm jumpers on the drive's SCSI ID connector (see 2 in Figure 3). Your drive may come set to a default SCSI configuration, with jumpers already installed. You can change the SCSI ID by rearranging, adding, or removing jumpers. To set the SCSI ID: __ 1. Locate the SCSI ID connector ( 2 in Figure 3). __ 2. Before attaching the SCSI bus cable to the server, determine the SCSI ID. Make sure that the ID is not being used by another device. __ 3. Referring to Figure 2, find the ID number that you chose, then place jumpers on the connector pins as shown (use a pair of needle-nose pliers to connect the jumpers to the pins that are shaded). Note: If you set the SCSI ID to 15, the drive will not necessarily be set to that ID; instead, the drive will expect to receive the SCSI ID through a command over its LDI interface. Figure 5. SCSI ID settings on the SCSI ID connector Setting the SCSI ID with a SCSI ID Switch If your enclosure uses a SCSI ID switch (rather than jumpers), connect the switch to the drive's SCSI ID connector 2 in Figure 3 . If any jumpers are preinstalled, be sure to remove them before connecting the switch. The SCSI ID switch must be compatible with the drive's SCSI ID connector and must make an electrical connection between the same pins as the jumpers to achieve the same corresponding SCSI ID. Supplying TERMPOWER (SCSI Drive Only) To supply TERMPOWER to the bus, locate one of the five jumpers shipped with the drive and place it on the SCSI ID connector as shown in the following figure. Place the jumper on the pins that are shaded. Installing the Drive 7

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Set
the
SCSI
ID
The
SCSI
ID
can
be
set
in
one
of
two
ways:
v
By
placing
jumpers
on
the
SCSI
ID
connector
v
By
using
a
SCSI
ID
switch
that
is
connected
to
the
SCSI
ID
connector
Setting
the
SCSI
ID
with
Jumpers
The
SCSI
ID
can
be
set
on
the
drive
by
installing
2
mm
jumpers
on
the
drive’s
SCSI
ID
connector
(see
±2²
in
Figure
3).
Your
drive
may
come
set
to
a
default
SCSI
configuration,
with
jumpers
already
installed.
You
can
change
the
SCSI
ID
by
rearranging,
adding,
or
removing
jumpers.
To
set
the
SCSI
ID:
__
1.
Locate
the
SCSI
ID
connector
(
±2²
in
Figure
3).
__
2.
Before
attaching
the
SCSI
bus
cable
to
the
server,
determine
the
SCSI
ID.
Make
sure
that
the
ID
is
not
being
used
by
another
device.
__
3.
Referring
to
Figure
2,
find
the
ID
number
that
you
chose,
then
place
jumpers
on
the
connector
pins
as
shown
(use
a
pair
of
needle-nose
pliers
to
connect
the
jumpers
to
the
pins
that
are
shaded).
Note:
If
you
set
the
SCSI
ID
to
15,
the
drive
will
not
necessarily
be
set
to
that
ID;
instead,
the
drive
will
expect
to
receive
the
SCSI
ID
through
a
command
over
its
LDI
interface.
Setting
the
SCSI
ID
with
a
SCSI
ID
Switch
If
your
enclosure
uses
a
SCSI
ID
switch
(rather
than
jumpers),
connect
the
switch
to
the
drive’s
SCSI
ID
connector
±2²
in
Figure
3
.
If
any
jumpers
are
preinstalled,
be
sure
to
remove
them
before
connecting
the
switch.
The
SCSI
ID
switch
must
be
compatible
with
the
drive’s
SCSI
ID
connector
and
must
make
an
electrical
connection
between
the
same
pins
as
the
jumpers
to
achieve
the
same
corresponding
SCSI
ID.
Supplying
TERMPOWER
(SCSI
Drive
Only)
To
supply
TERMPOWER
to
the
bus,
locate
one
of
the
five
jumpers
shipped
with
the
drive
and
place
it
on
the
SCSI
ID
connector
as
shown
in
the
following
figure.
Place
the
jumper
on
the
pins
that
are
shaded.
Figure
5.
SCSI
ID
settings
on
the
SCSI
ID
connector
Installing
the
Drive
7