Configuring and Installing Components
4-53
4.16 External SCSI Expansion
External SCSI devices, such as tabletop or rack-mounted storage devices, can be
connected to the system using PCI-based SCSI adapters. Use the following
rules to determine if a particular device can be used:
•
The device must be supported by the operating system. Consult the sup-
ported options list.
•
Do not exceed the maximum number of devices supported on the SCSI con-
troller to be used.
•
Each device on the bus must have a unique SCSI ID.
•
The entire SCSI bus length, from terminator to terminator, must not exceed
the following limits:
Fast differential SCSI or
Ultra SCSI HVD
25 meters
Fast single-ended SCSI
3 meters
Ultra-wide SCSI
1.5 meters
Ultra 2 SCSI LVD
12 meters
Ultra 3 SCSI
12 meters
•
Ensure that the SCSI bus is properly terminated and that no devices in the
middle of the bus are terminated.
•
For best performance, wide devices should be operated in wide SCSI mode.
Содержание AlphaServer ES45 1B
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