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Chapter 1 45
Using Your Personal Workstation
Connecting SCSI Accessories
While SE SCSI devices will work when attached to connector 1 or 2, this
will limit all devices to single-ended mode. For example, this would
result in the Ultra 160/m hard disk drive performance being limited from
160 MB/second to 40 MB/second. Therefore, it is recommended that you
connect only LVD SCSI devices to connectors 1 and 2.
Connecting an External SCSI Accessory
The intended use of the external SCSI connector is to connect
Low-Voltage Differential SCSI devices to your Personal Workstation.
An external SCSI device is connected as follows:
1. Assign an unused SCSI address to the accessory. SCSI addresses
range from 0 to 15 for wide 16-bit SCSI devices. The SCSI address 0 is
reserved for the first SCSI hard disk drive and SCSI address 7 is
reserved for the SCSI controller (the default for narrow and wide
SCSI devices).
Refer to the manual provided with the SCSI accessory for
instructions on selecting a SCSI address.
NOTE You do not need to set a SCSI address for Plug-and-Play SCSI devices
(SCSI devices that support the SCAM protocol).