HP Vectra XW Optimization Manual page 32

The External SCSI
Connection
NOTE
1 Your Personal Workstation's Performance Features
Increasing the Speed Limit With Ultra SCSI
The external SCSI connector on the rear panel can be used to connect
external SCSI devices like tape drives. Use of the external connector will
be detected automatically by your system at power-on.
On detecting that the external SCSI connector is in use, your Personal
Workstation will automatically:
disable the SCSI terminator on the system board
•
disable Ultra SCSI data transfer rates for all SCSI devices.
•
When you turn on your Personal Workstation, be sure to turn on any
external SCSI devices first. Failure to do this may result in your external
SCSI devices being incorrectly detected by your system.
When connecting SCSI devices, it is recommended that you observe
the following overall cable length restrictions.
Configuration
Ultra SCSI operation (20 MB/s) with up to
four devices connected
Ultra SCSI operation (20 MB/s) with five or
more devices connected
SCSI-2 operation (10 MB/s) with up to
seven devices connected
26 English
Maximum Recommended Cable Length
3 m
1.5 m
6 m