Notes
If you plan to install both internal and external
SCSI devices, you must follow the instructions
given in “Internal Drives” on page 65 in addition
to the instructions in this section. Read “Internal
Drives”; then, return here.
For additional information about SCSI
configurations supported, see
http://www.pc.ibm.com/us/server/
The server comes with a wide (16-bit) SCSI
cable that supports 16-bit devices. If you want to
attach narrow (8-bit) devices to the server, a
SCSI 68-pin to 50-Pin Converter must be
purchased that will enable the connection of the
device to the cable that comes with the server.
It is good practice not to exceed the following
cable-length guidelines:
–
If you connect one or more Fast SCSI
devices to the UltraSCSI controller, do not
exceed 3 meters (9.8 feet) total length for all
cables (internal and external)
–
If you only connect Fast SCSI devices to the
UltraSCSI controller, do not exceed 6
meters (19.7 feet) total length for all cables.
–
If you connect four or less UltraSCSI
devices to the UltraSCSI controller, do not
exceed 1 meter (3.3 feet) total length for all
cables.
Attention
In addition to cable length and the number of installed
devices, you must consider other factors that limit the
performance of the SCSI subsystem. For example, if
you install UltraSCSI devices in an external expansion
enclosure that is limited to Fast transfer rates, the
transfer rate to the UltraSCSI devices must be limited
to Fast transfer rates. You accomplish this by using
the SCSISelect Utility program. See “SCSISelect
Utility” on page 42 for additional information.
If you plan to attach an external SCSI device, you must
order an additional SCSI cable. That is, to use an external
device with the Netfinity 3500 server, you must connect it
to the external SCSI connector, using a SCSI cable. This
SCSI cable must have the proper connector for the SCSI
external connector on one end, and the proper connector
for the external device on the other end.
IBM Netfinity 3500 - Type 8644
59
Summary of Contents for Netfinity 3500 Series
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