Uses for a couple boxes full of Compaq 2.1gig Fast-Wide SCSI2?

[Mike Bilow]

Rich Braun wrote in a message to Mike Bilow:

 RB> It provides an economical "narrow", a high-performance
 RB> "wide", and a niche-market "ultra-wide" set of bus-width
 RB> options (8, 16, and 32 bits). It provides standard and
 RB> "fast" bus speeds (5 and 10 MHz).

"Ultra" is universally used to refer to 20 MHz bus speed, not 32-bit width. 
Since 32-bit width is extremely rare, no standard term seems to have evolved
for it.  The most common term I have seen is "superwide" for 32-bit width.

SCSI glossary:

Narrow = 8-bit bus
Wide = 16-bit bus
Superwide = 32-bit bus

Standard = 5 MHz
Fast = 10 MHz
Ultra = 20 MHz
Ultra2 = 40 MHz

 RB> And it provides bus parity along with two options for 
 RB> signalling, so-called 'single-ended' versus 'differential' (the 
 RB> latter is considered more reliable for longer cable runs, but 
 RB> requires almost twice as many connector pins).

Also, there is "low-voltage differential," which is used for Ultra2 speeds.
 
-- Mike


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