HP 220mx HP SureStore 220mx Optical Jukebox User's Guide - Page 23

Connecting the Jukebox with Other SCSI, Peripherals

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Setting Up the Jukebox Setting up the Jukebox Connecting the Jukebox with Other SCSI Peripherals IMPORTANT Connecting the Jukebox with Other SCSI Peripherals Connecting this jukebox with other peripherals on the bus is shown in Figure 1-5. Other devices on the same bus as this jukebox will affect jukebox performance. Consider the following issues if you are deciding whether to connect other devices onto the same bus. • How will the jukebox be used: archiving, backup, near-line storage? What performance must be maintained? • How will the additional peripheral will be used? How much demand will the additional peripheral place on the bus? • What is the bus length available? CAUTION IMPORTANT A basic review of SCSI and a discussion of the issues involved with connecting devices on a bus is in Appendix B. Do not connect a high-voltage differential device onto the same bus as this jukebox. Damage to the high-voltage differential device interface electronics can occur. Do not add a a single-ended device onto the bus if you intend the bus to be a low-voltage differential bus. The bus will switch to single-ended mode if any single-ended devices are detected. If you mix single-ended and low-voltage differential devices (causing single-ended operation) on total cabling longer than 9.8 feet (3 metres), SCSI bus problems could occur. This jukebox will operate in single-ended mode, but must be on a bus that is 9.8 feet (3 metres) or less. Chapter 1 1- 11

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Chapter 1
1-11
Setting up the Jukebox
Connecting the Jukebox with Other SCSI Peripherals
Setting Up the Jukebox
Connecting the Jukebox with Other SCSI
Peripherals
Connecting this jukebox with other peripherals on the bus is shown in
Figure 1-5.
IMPORTANT
Other devices on the same bus as this jukebox will affect jukebox
performance. Consider the following issues if you are deciding whether to
connect other devices onto the same bus.
•
How will the jukebox be used: archiving, backup, near-line storage?
What performance must be maintained?
•
How will the additional peripheral will be used? How much demand
will the additional peripheral place on the bus?
•
What is the bus length available?
A basic review of SCSI and a discussion of the issues involved with
connecting devices on a bus is in Appendix B.
CAUTION
Do not connect a high-voltage differential device onto the same bus as
this jukebox. Damage to the high-voltage differential device interface
electronics can occur.
IMPORTANT
Do not add a a single-ended device onto the bus if you intend the bus to
be a low-voltage differential bus. The bus will switch to single-ended
mode if any single-ended devices are detected.
If you mix single-ended and low-voltage differential devices (causing
single-ended operation) on total cabling longer than 9.8 feet (3 metres),
SCSI bus problems could occur. This jukebox will operate in single-ended
mode, but must be on a bus that is 9.8 feet (3 metres) or less.