SCSI Devices128
B.1 SCSI Guidelines
When installing and operating SCSI devices, you must follow these guidelines:
• A wide (68-pin) SCSI controller with two channels, one for internal devices and one for external devices. Five
internal SCSI devices are supported.
• If multiple SCSI devices are used, split the devices between Channels A and B for optimum performance. Cable
length for the second channel should not be longer than 18 inches.
CAUTION: Do not route data cables near the air intake to the power supply. Cables routed in this manner can block
the airflow and cause the workstation to overheat.
• All SCSI controllers require a unique SCSI ID (0–15) for each SCSI device installed. Refer to section B.4 for more
information.
• Every SCSI chain or circuit must be terminated (closed) at both ends. Some system boards have both ends of the
SCSI cable connected to, and terminated by, the system board. Termination can be accomplished in one of
several ways:
• Use a cable with a built-in terminator.
• Use a cable with a terminating resistor plug in the last connector.
• Connect a SCSI device with its termination enabled into the last connector.
• Connect an external SCSI device with its termination enabled to the external SCSI connector on the rear
panel of the workstation.
• Turn on all external SCSI devices before turning on the power to the workstation. This enables the SCSI controller
to recognize the external devices.
B.2 Using SCSISelect with SCSI Devices
The Ultra160 and faster SCSI host adapters include the SCSISelect utility to configure the host adapter and to run the
SCSI disk utilities. To run the SCSISelect utility:
NOTE: The onboard LSI SCSI controller on the xw4300 has an “LSI Logic Configuration Utility” that you access
through Ctrl-C when the LSI option ROM is initializing.
• In POST Messages Enabled mode: Press Ctrl+A when the “Press<Ctrl><A> for SCSISelect Utility” message
appears during POST. The utility will only be present if an Adaptec SCSI card is present.
• In POST Messages Disabled mode: When the HP logo screen appears, press any key to exit the logo screen.
Immediately after exiting the logo screen, press Ctrl+A to access the SCSISelect utility. The utility will only be
present if an Adaptec SCSI card is present.
A menu appears with the following options:
• Configure/View Host Adapter Settings
•SCSI Bus Interface Definitions
•Host Adapter SCSI ID
•SCSI Parity Checking
•Host Adapter SCSI Termination
•Additional Options
• Boot Device Options
•SCSI Device Configuration
• Advanced Configuration Options
• SCSI Disk Utilities
• Lists all SCSI devices and SCSI ID numbers
NOTE: For additional information about configuring POST message display status, refer to section 3.1.3 “Computer
Setup Menu”.
B.3 SMART
The SMART SCSI hard drives for HP workstations have built-in drive failure prediction that warns the user or the network
administrator of an impending failure or crash of the hard drive. SMART drives track fault prediction and failure
indication parameters, such as re-allocated sector count, spin retry count, and calibration retry count. If the drive
determines that a failure is imminent, it generates a fault alert.
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