External options
Before you begin:
Read “Safety information” on page 240.
Read the documentation that comes with the
options.
Connecting external SCSI devices:
The
server comes with one external SCSI port so that you can
connect external SCSI devices.
You can also attach a SCSI storage expansion enclosure
to the server.
Cabling requirements:
If you plan to install external
SCSI devices, you must order additional SCSI cables.
These cables must have the proper connectors for the
SCSI external connector and the external devices. To
select and order the correct cables for use with external
devices, contact the IBM reseller or IBM marketing
representative.
Refer to the information that comes with the adapter to
determine the number of internal and external connectors,
channels, and SCSI devices that the adapter supports.
For information about the maximum length of SCSI cable
between the terminated ends of the cable, see the
following ANSI SCSI Standards:
X3.131-1986 (SCSI)
X3.131-1994 (SCSI-2)
X3T10/1071D
X3T10/1142D (Ultra-2 SCSI)
X3.302:1998 (Ultra-2 SCSI)
Adhering to these standards ensures that the server
operates properly.
Setting SCSI IDs for external devices:
Each SCSI
device that is connected to a SCSI controller must have a
unique SCSI ID, so that the SCSI controller can identify
the devices and ensure that different devices do not
attempt to transfer data at the same time. SCSI devices
that are connected to different SCSI controllers can have
duplicate SCSI IDs. Refer to “SCSI IDs” on page 112 and
to the instructions that come with the SCSI devices for
more information about setting a SCSI ID.
Installing external devices:
To attach an external
device:
1. Run the shutdown procedure for the operating
system. Turn off the server and all attached devices.
2. Follow the instructions that come with the option to
prepare it for installation and to connect it to the
server.
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