Appendix B
B-9
Operating This Jukebox on a SCSI Bus
The SCSI Bus and This Jukebox
Op
eration o
n
a
SC
SI
Bu
s
Because a narrow device only has a 50-pin connector, it will not transmit the eight
extra bits of data needed for the wide device on the end of the bus. Using only 50
lines also prevents the narrow device from passing along the IDs of devices at 8 or
above.
The lower eight data lines transfer commands and messages, allowing all devices,
regardless of size, to co-exist on the bus. However, data transfers and device
addressing occur on the higher bits. Since a narrow device can’t "see" the upper 8
data bits, that translates to it not being able to "see" wide devices with a SCSI ID
above 8. Remember the host adapter is a device, so if you’re mixing wide and
narrow devices on the bus, your host adapter must be at an ID that all devices can
address.
If mixing narrow and wide devices is unavoidable, use the configuration described
below:
Summary of Contents for SureStore 220mx
Page 10: ...x Figures ...
Page 12: ...xii Tables ...
Page 13: ...Chapter 1 Setting up the Disk Drive Setting Up the Jukebox 1 Setting Up the Jukebox ...
Page 35: ...Using Optical Disks 2 Using Optical Disks ...
Page 41: ...Operating the Jukebox 3 Operating the Jukebox ...
Page 81: ...Supplies and Customer Support A Supplies and Customer Support ...
Page 89: ...Operation on a SCSI Bus B Operating This Jukebox on a SCSI Bus ...
Page 107: ...Safety and Regulatory Information C Safety and Regulatory Information ...
Page 112: ...C 6 Safety and Regulatory Information Declaration of Conformity Declaration of Conformity ...