HP 220mx HP SureStore 300mx/600mx/700mx Optical Jukebox User's Guide - Page 88

The SCSI Bus and This Jukebox

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Figure B-1 Operating This Jukebox on a SCSI Bus The SCSI Bus and This Jukebox The SCSI Bus and This Jukebox This jukebox is a "fast and narrow" SCSI device with the capability to connect to either a narrow single-ended bus or a wide differential bus. In the diagram below, note that the single-ended (50-line) bus is brought directly onto the jukebox internal narrow bus. The differential interface accepts a wide bus in its 68-pin connector, but only uses the 50 data and control lines that comprise the "narrow" portion of the bus. The other 18 lines that provide the upper IDs and data of the wide bus are ignored. Note that all lines of the wide bus pass through the two 68-pin differential connectors. The wide bus is maintained as a wide bus. The single-ended connectors are 50-pin and can accept only a narrow bus. The differential ports use 68-pin connectors and can accept (and pass through) a wide bus. Single-ended and Differential Interfaces on This Jukebox B- 7 Appendix B

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B-7
Appendix B
Operating This Jukebox on a SCSI Bus
The SCSI Bus and This Jukebox
The SCSI Bus and This Jukebox
This jukebox is a
“
fast and narrow
”
SCSI device with the capability to connect to
either a narrow single-ended bus or a wide differential bus.
In the diagram below, note that the single-ended (50-line) bus is brought directly
onto the jukebox internal narrow bus.
The differential interface accepts a wide bus
in its 68-pin connector, but only
uses the 50 data and control lines
that comprise the
"
narrow
" portion of the bus. The other 18 lines that provide the upper IDs and data
of the wide bus are ignored. Note that all lines of the wide bus pass through the two
68-pin differential connectors. The wide bus is maintained as a wide bus.
The
single-ended
connectors are 50-pin and can accept only a narrow bus. The
differential
ports use 68-pin connectors and can accept (and pass through) a wide
bus.
Figure B-1
Single-ended and Differential Interfaces on This Jukebox