Appendix A. Library Specifications
The SCSI Bus
When considering SCSI bus configuration, be sure to note:
•Whether the bus and attached devices are
•Whether the bus and attached devices are fast/slow or wide/narrow
Single-Ended, LVD, or HVD
All SCSI devices attached to a bus must be of the same type, either
•A
•An LVD SCSI bus has a maximum length of 39.4 feet.
•An HVD SCSI bus has a maximum length of 82 feet.
Fast/Slow and Wide/Narrow SCSI
Fast/slow and wide/narrow refer to the signal configuration for different kinds of SCSI busses. The Spectra 10000 library uses the SCSI fast/wide standard.
•Slow SCSI means that the bus used allows transfer speeds of 5 MB/sec to 10 MB/sec, depending on bus width.
•
•Fast SCSI means that the bus used allows transfer speeds of 10 MB/sec to 20 MB/sec, depending on bus width.
•Narrow SCSI means that the bus used is 8 bits wide.
•Wide SCSI means that the bus used is 16 bits wide.
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