🚀 go-pugleaf

vhalkka@klaava.Helsinki.FI (Vesa Halkka) writes:
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| Quite many vendors are selling CDDI stuff, and there is a standard, but
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But the standard isn't completely settled yet.


vjs@rhyolite.wpd.sgi.com (Vernon Schryver) writes:
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| For now, given that few others besides Crescendo are building CDDI
| concentrators, it seems likely that CDDI interoperability is not a problem.
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Well, there's what Crescendo has *now* [same as what we were showing at
Interop in Fall '92], and what the X3T9.5 standards committee is going
to agree on. Already there have been changes. The "scrambler" coding
recently agreed on by the committee is incompatible with the existing
Crescendo implementation [which caused a lot of semiconductor manufacturers
to have to re-spin their chips]; the final standards for "equalization"
(filtering), wiring, and connectors have yet to be settled.

Since some people seem to be deploying the existing Crescendo stuff, I expect
that we'll end up with at least two versions: the existing Crescendo stuff
and the "ANSI Standard" version. Fortunately, since most uses of CDDI are
for SAS configurations (i.e., station to concentrator), you should be able
to intermix the two in the same ring (possibly even in the same concentrator,
if Crescendo makes their CDDI modules pluggable).


-Rob

-----
Rob Warnock, MS-9U/510		rpw3@sgi.com
Silicon Graphics, Inc.		(415)390-1673
2011 N. Shoreline Blvd.
Mountain View, CA  94043