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Summary of SCSI Protocols and Transfer Modes

For easier comparison, the chart below shows all of the different SCSI transfer modes and feature sets, along with their key characteristics. For your clicking pleasuer, I've also hyperlinked everything that wasn't nailed down ;^)

Some notes on this table:

• "(DT)" means that transfer mode uses double transition clocking.
• Throughput numbers are in decimal megabytes per second.
• To keep the table from getting cluttered, I've only mentioned current cabling, not obsolete cables.
• The number of devices includes the host adapter.
• For Ultra and faster speeds, the maximum length of cable for some signaling types depends on the number of devices on the chain; thus, the multiple rows.
• Ultra320 specifications are not final as of this writing.

Note: The number of devices (8 or 16) includes the host adapter.

Next: SCSI Host Adapters

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