Intergraph Zx10 Ultra-Tower, System Manual

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Assigning System Resources
Some expansion cards include a configuration diskette that you can use to reserve the system
resources required for the card. Other expansion cards do not include a diskette, but require that
you manually program the BIOS with the configuration information.
See the System Board Manual for details on using BIOS Setup to assign system resources and
configure the BIOS for expansion cards.
Disabling On-Board Controllers
You may need to disable the on-board audio, networking, or SCSI controllers to use an expansion
card for these functions. You can disable these on-board functions using the BIOS Setup program.
See the System Board Manual for details on using BIOS Setup to disable the on-board controllers.
Adding External SCSI Peripheral Devices
The system has a dual-channel low-voltage differential (LVD) SCSI controller integrated on the
system board. Depending on your system configuration, you can connect Ultra, Ultra2, or Ultra3
SCSI peripheral devices to the SCSI port on the back of the base unit. The port connects to
Channel A of the SCSI controller. See Chapter 1, “Setting Up the Hardware,” to locate the SCSI
port.
CAUTION On a server system, if you do not connect an external SCSI peripheral device to the
SCSI port, connect a terminator module to the port.
Choosing SCSI Cables
For each SCSI bus, the type of bus and the data clock speed of the fastest device on that bus
determines its maximum length. Knowing this, you can determine the maximum cable length you
can use to connect external SCSI devices to the system.
The following table provides a guide to maximum SCSI bus length. Note that bus width (for
example, Narrow versus Wide) does not affect the maximum bus length.
SCSI Bus Single-Ended Bus Differential Bus LVD Bus
Ultra (8 bits, 20 MB/sec) 4.9 ft / 1.5 m 39.4 ft / 12 m 39.4 ft / 12 m
Wide Ultra (16 bits, 40 MB/sec) Not recommended Not specified 39.4 ft / 12 m
Ultra2 (16 bits, 80 MB/sec) Not recommended Not specified 39.4 ft / 12 m
Ultra3 (16 bits, 160 MB/sec) Not recommended Not specified 39.4 ft / 12 m