On Fri, 7 Jul 2000, Erik E. Fair wrote:
> Question: what happens to the bandwidth of an 8-bit 20 MByte/sec bus 
> when you double its width to 16-bits? It doubles to 40 Mbyte/sec.
> 
> You're actually getting Ultra/Wide SCSI there.

From the original message:
sd0 at scsibus2 targ 0 lun 0: <MICROP, 3387WS, x43h> SCSI2 0/direct fixed
sd0(ncr1:0:0): WIDE SCSI (16 bit) enabled
sd0(ncr1:0:0): 20.0 MB/s (100 ns, offset 15)

Like it says, that's 20.0 MBytes/second... 100ns is 10MHz. If it were
actually running in Ultra/Wide, it'd say 40.0 MB/s (50 ns, offset
[something]).
-- 
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