Phoenix VX3-350-SCW-DAT, Technical Information

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Drive Software Configuration
Initially you will need to run a device setup program in order to configure the software and hardware to properly recognize
the drives on the VX3-350-SCW-DAT. You should consult the host/processor manual and/or operating system manuals
for a description of the utility required to properly format and use your mass storage subsystem.
DAT Drive Software Configuration
The DAT drive can be installed as SCSI unit 0-15 (F). It has a formatted compressed storage capacity of up to 40 Giga-
bytes. You can assign the logical unit designation from the SCSI setup utility.
Hard Drive Software Configuration
The hard disk drive can be installed as SCSI unit 0-15(F). The disk drive characteristics are described in detail in Chapter
4. It operates using the Ultra-160 SCSI interface and has to be configured by the host operating system software for
proper operation.
Termination
The Multimode termination required for the LVD/SE SCSI-3 bus is on the VX3 module. The SensiTerm TM circuitry will
automatically configure the termination for the SCSI bus. It determines if the SCSI bus signals are received from the P2
connector or from the Micro-D connector on the front panel and sets the termination at the correct end of the SCSI bus. If
the module is in the middle of a SCSI bus route, the SensiTerm
TM circuitry automatically disables all on board termination.
DIFFSNS Signal
The voltage level of the DIFSNS signal determines if the drives will run in a Single Ended SCSI configuration or a Low
Voltage Differential configuration. With a DIFFSNS voltage level of 0 Volts (Ground), the unit will terminate the bus in the
Single Ended SCSI mode. If the DIFFSNS line can be driven to 1.3 volts, indicating that the Host adapter is LVD capable,
the bus will be terminated in the Low Voltage Differential mode. If any SCSI unit attached to the bus is only Single Ended
SCSI capable, the bus will terminate in the Single Ended mode.
Terminator Power
Terminator power for the drives is routed from the front panel uD68 pin connector to the termination circuitry and to the P2
connector, Pin C18. The Terminator power has to be generated at the SCSI Host adapter.
Operation
Once the VX3-350-SCW-DAT has been configured properly and the software has been set up, operation is identical to
that of a standard SCSI storage subsystem. No specialized software is required.
Configuration, Installation, and Operation 3-4