Appendix B
B-5
Operating This Drive on a SCSI Bus
A Brief Overview of SCSI
Oper
ati
n
g th
e Drive
o
n
a
SC
SI
Bu
s
The differential bus uses two lines for each signal and measures the voltage
difference between the two signals. Differential retains more signal quality than
single-ended and is not as sensitive to noise, allowing for a longer cable length. The
maximum allowable length of a differential bus is 25 meters (82 feet) for all types
buses (narrow, wide, fast, Fast-20).
Connectors
Narrow devices (50-pin) use the following connectors:
•
50-pin low-density clip Centronics-type (external)
This is a large connector that is similar to a printer cable. This type of connector
is gradually being replaced by the Micro D connector, described below.
•
50-pin high density Micro D (using thumbscrews or small clips) (external)
•
This connector is similar to a D-type connector, but smaller and with smaller pin
holes placed closer together.
•
50-pin low-density ribbon (usually internal to the host)
Wide devices (68- pin) use the following connectors:
•
68-pin high density Micro D connector (external)
This connector is similar to a D-type connector, but longer and slimmer and with
smaller pin holes placed closer together. This connector is becoming the most
common.
•
68-pin high density ribbon (usually internal to the host)
NOTE
For more complete information on the theory and operation of the SCSI bus, you
may want to go to:
Adaptec - major supplier in SCSI buses
www.adaptec.com
Symbios Logic - Working drafts of SCSI specifications
www.symbios.com/x3t10
Содержание Surestore 5200ex - Optical Disk Drives
Страница 10: ...x Figures ...
Страница 11: ...Setting up the Disk Drive 1 Setting up the Disk Drive ...
Страница 22: ...1 12 Chapter1 Setting up the Disk Drive Configuring to an HP UX 10 2 11 0 Host ...
Страница 23: ...Using Optical Disks 2 Using Optical Disks ...
Страница 29: ...Operating the Disk Drive 3 Operating the Disk Drive ...
Страница 40: ...3 12 Chapter3 Operating the Disk Drive Troubleshooting ...
Страница 41: ...Supplies and Customer Support A Supplies and Customer Support ...
Страница 57: ...Operating the Drive on a SCSI Bus B Operating This Drive on a SCSI Bus ...
Страница 65: ...Safety and Regulatory Information C Safety and Regulatory Information ...
Страница 74: ...C 10 AppendixC Safety and Regulatory Information Japanese VCCI Statement ...