Digital Equipment Prioris HX590 DP, Руководство по техническому обслуживанию

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Digital PRIORIS HX590 & HX590 DP Server Service Procedures
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Connecting SCSI devices
The server supports up to 10 internal SCSI devices. Additional SCSI devices can be added to the server by
using an EISA- or PCI-based SCSI host adapter installed in an available expansion slot in conjunction with an
external SCSI expansion box.
The storage backplane supports seven hot-swap devices split between two SCSI bus sections, SCSI bus A and
SCSI bus B. SCSI bus A is the upper section and consists of four SCSI device connections. SCSI bus B is the
lower bus section and consists of three SCSI device connections. These buses can be configured as two
independent SCSI channels or as one channel by installing a wide SCSI jumper cable. See the relevant topic
below for information on single or dual SCSI channel configurations.
The server has been supplied with a standard wide (68-pin) SCSI cable that attaches to the SCSI host adapter at
one end and to SCSI bus A at the other end. The three middle device connectors support the upper left and
right drive bays. Three wide-to-narrow cable adapters were provided to connect narrow devices in the upper
drive bay areas. A SCSI bus jumper connects SCSI bus A and SCSI bus B. A wide internal terminator is
installed at the end of SCSI bus B.
SCSI Configuration Guidelines
The PRIORIS HX590 & HX590 DP Server has a hot-swap backplane that supports one or two channel SCSI
host adapters and up to seven 3½-inch SBBs. Multiple SCSI host adapters can also be used to improve server
performance or to increase the number of SCSI devices that you connect to the server.
The server configuration, SCSI adapter(s), and all SCSI devices must work together for optimum performance.
When installing SCSI devices, use the following guidelines to configure the server and all SCSI devices:
The last physical SCSI device on each end of the SCSI bus must be terminated. Only use SCSI devices without
terminators. If the SCSI device came with a built-in terminator installed, you must remove or disable the
terminator from the device before you complete the installation.
NOTE The server uses a single-ended actively terminated cable. Use only the SCSI cable
supplied with the server.
Refer to the SCSI device's manufacturer documentation for the terminator location.
Each SCSI device (including the SCSI host adapter) must be configured with a unique ID number. SCSI host
adapters usually default to ID 7. Use SCSI ID 0 through 6 (narrow devices) and 0 through 15 (wide devices)
for the remaining SCSI devices.
The server is supplied with a wide (68-pin) five connector cable assembly. A wide-to-narrow cable adapter is
used to connect narrow (50-pin) devices for SCSI operation. Three cable adapters, two 68-pin internal
terminators, and one 68-pin-to-68-pin jumper cable are supplied with the standard wide SCSI cable.
SCSI device drivers are required to operate the SCSI devices.
Refer to the System and Options Configuration Guide for ordering and configuration information on additional
SCSI cables and devices. Ordernumber ER-880WW-CA.A01.
External SCSI Bus Guidelines
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Make sure that the SCSI addresses select for the external SCSI devices do not conflict with other SCSI
devices in the storage system cabinet.
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Make sure that the external SCSI bus is terminated properly.
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For proper operation, the length of the SCSI cable must not exceed 1 meter (3.28 ft).
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Use only a high-density external connector.