IBM 8649 Hardware Maintenance Manual - Page 81

Serial, connectors, Ultra320, connector

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13 1 25 14 The parallel connector supports three standard Institute of Electrical and Electronics Engineers (IEEE) 1284 modes of operation: Standard Parallel Port (SPP), Enhanced Parallel Port (EPP), and Extended Capability Port (ECP). If you configure the parallel port to operate in bidirectional mode, it supports the ECP and EPP modes of operation. To configure the parallel port, use the Devices and I/O Ports option in the Configuration/Setup Utility program. See the User's Guide for more information. If you configure the parallel port to operate in bidirectional mode, use an IEEE 1284-compliant cable that does not exceed 3 meters (9.8 ft). Serial connectors Use the serial connectors to connect serial devices. The following illustration shows a serial connector. 1 5 6 9 Ultra320 SCSI connector You can install up to four internal SCSI devices using the SCSI cable that comes with some models of the server. Other server models might come with one SCSI cable that is connected from the internal SCSI channel A connector to the standard hot-swap-drive backplane. You can attach additional internal SCSI devices to the other internal SCSI channel B connector, or you can use channel B for external SCSI devices. To use channel B for external SCSI devices, remove the SCSI knockout from the rear of the server and secure the free end of an optional channel B cable in the new opening. If you want to attach external SCSI devices to the server without using the internal SCSI channel B, you must install an optional SCSI adapter. Notes: 1. External SCSI devices connected to internal SCSI channel B will operate asynchronously. 2. If you install a PCI RAID adapter to configure and manage the internal hot-swap drives, you must move the SCSI cable from the system-board SCSI connector to an internal channel connector on the RAID adapter (except for the ServeRAID-6i controller, which uses the system-board integrated SCSI controller with RAID capabilities). See "Cabling an optional SCSI adapter" on page 43 for additional information. An optional external SCSI connector might be installed on the rear of the server. Use this connector to connect external SCSI devices. The following illustration shows the SCSI standard 68-pin, female D-shell SCSI connector. 34 1 68 35 Chapter 4. Installing options 71

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13
1
25
14
The
parallel
connector
supports
three
standard
Institute
of
Electrical
and
Electronics
Engineers
(IEEE)
1284
modes
of
operation:
Standard
Parallel
Port
(SPP),
Enhanced
Parallel
Port
(EPP),
and
Extended
Capability
Port
(ECP).
If
you
configure
the
parallel
port
to
operate
in
bidirectional
mode,
it
supports
the
ECP
and
EPP
modes
of
operation.
To
configure
the
parallel
port,
use
the
Devices
and
I/O
Ports
option
in
the
Configuration/Setup
Utility
program.
See
the
User’s
Guide
for
more
information.
If
you
configure
the
parallel
port
to
operate
in
bidirectional
mode,
use
an
IEEE
1284-compliant
cable
that
does
not
exceed
3
meters
(9.8
ft).
Serial
connectors
Use
the
serial
connectors
to
connect
serial
devices.
The
following
illustration
shows
a
serial
connector.
1
5
6
9
Ultra320
SCSI
connector
You
can
install
up
to
four
internal
SCSI
devices
using
the
SCSI
cable
that
comes
with
some
models
of
the
server.
Other
server
models
might
come
with
one
SCSI
cable
that
is
connected
from
the
internal
SCSI
channel
A
connector
to
the
standard
hot-swap-drive
backplane.
You
can
attach
additional
internal
SCSI
devices
to
the
other
internal
SCSI
channel
B
connector,
or
you
can
use
channel
B
for
external
SCSI
devices.
To
use
channel
B
for
external
SCSI
devices,
remove
the
SCSI
knockout
from
the
rear
of
the
server
and
secure
the
free
end
of
an
optional
channel
B
cable
in
the
new
opening.
If
you
want
to
attach
external
SCSI
devices
to
the
server
without
using
the
internal
SCSI
channel
B,
you
must
install
an
optional
SCSI
adapter.
Notes:
1.
External
SCSI
devices
connected
to
internal
SCSI
channel
B
will
operate
asynchronously.
2.
If
you
install
a
PCI
RAID
adapter
to
configure
and
manage
the
internal
hot-swap
drives,
you
must
move
the
SCSI
cable
from
the
system-board
SCSI
connector
to
an
internal
channel
connector
on
the
RAID
adapter
(except
for
the
ServeRAID-6i
controller,
which
uses
the
system-board
integrated
SCSI
controller
with
RAID
capabilities).
See
“Cabling
an
optional
SCSI
adapter”
on
page
43
for
additional
information.
An
optional
external
SCSI
connector
might
be
installed
on
the
rear
of
the
server.
Use
this
connector
to
connect
external
SCSI
devices.
The
following
illustration
shows
the
SCSI
standard
68-pin,
female
D-shell
SCSI
connector.
34
1
68
35
Chapter
4.
Installing
options
71