2
Bus Segments on the Adaptec SCSI Card 29160
The Adaptec SCSI Card 29160 features Adaptec SpeedFlex™
technology. SpeedFlex technology ensures that you get the best
performance from your Ultra160 and Ultra2 SCSI devices by
electronically isolating the primary LVD/SE segment from the
secondary SE segment on the SCSI bus. This allows the Adaptec
SCSI Card 29160 to support newer Ultra160 and Ultra2 SCSI
devices at speeds up to 160 MBytes/sec on the primary LVD/SE
segment while at the same time supporting Ultra (legacy) devices
at speeds up to 40 MBytes/sec. on the secondary SE segment. The
following figure shows the two SCSI segments
If you attach Wide Ultra or Ultra SCSI devices to the
LVD/SE connector(s), the data transfer rate for all attached
Ultra160 and Ultra2 SCSI devices will drop to Ultra SCSI per-
formance levels. However, if you attach only Ultra160 and
Ultra2 SCSI devices to the LVD/SE connector(s), data will be
transferred at the maximum possible rate (80 MBytes/sec for
Ultra2 devices and 160 MBytes/sec for Ultra160 devices).
AIC-3860
AIC-7892
Primary LVD/SE
segment
Secondary SE
segment
N
OTE
29160_OEM_InsGd.fm Page 2 Tuesday, October 19, 1999 7:47 AM
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