Scsi Bus Differences - HP Visualize J5000 Owner's Manual

CAUTION
Table 7-1
Type
Transfer
Ultra Narrow Up to 20
Single-Ended Mbytes/sec
Ultra2 Wide Up to 80
Low-Voltage Mbytes/sec
Differential
1. Address 7 is reserved for host controller use on all buses.
2. This information is specific to the HP Visualize B1000/C3000 and J5 Class and J7 Class
computers.

SCSI Bus Differences

A Small Computer Systems Interface (SCSI) bus is an IEEE standard
bus for connecting your workstation to internal and external devices
(SCSI devices) running at different speeds. There maybe one device
connected to the external SCSI port or several SCSI devices may be daisy
chained together and connected to the external SCSI port. Examples of
these SCSI devices are 4mm DDS-format tape drives and hard disk
drives.
There are two types of SCSI buses available with this workstation—an
Ultra Narrow Single-Ended SCSI bus (NSE SCSI), and an Ultra2 Wide
Low-Voltage Differential SCSI bus (LVD SCSI). The following table
shows the specification differences between these SCSI buses.
Currently Hewlett-Packard does not support mixing Ultra Narrow
Single-Ended and Ultra2 Wide Low-Voltage Differential devices on any
one bus type.
SCSI Bus Differences
Data Data Bus
Width
Rate
8 bits
16 bits
Chapter 7
Available Maximum
SCSI Cable Length
1
Addresses
0 through 6 3.0 meters
(9.84 feet)
0 through 6; 12 meters
8 through 15 (39.37 feet)
SCSI Connections
SCSI Bus Differences
Device
Physical
2
Location
Internal and
external
Internal and
external
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