Product manual

ESP Installation Requirements
77 A1 69UP Rev00 B-5
B.4 ULTRA SCSI Channel Adapters
Several Fast-Wide / Ultra SCSI adapters are available in CDA 7, depending on the
host channel connection requirements, such as terminated and non-terminated
channels, and Y-cable cluster configurations.
NOTE:
Contact your Bull Sales Representative to obtain SCSI adapter part numbers.
For cluster configurations, refer to the Symmetrix High Availability Environment
Product Guide.
B.5 SCSI Cable Precautions
When connecting CDA 7 Ultra SCSI channels to host channels it is important to
know CDA 7 Ultra SCSI hardware components and their channel designations.
Each Ultra SCSI director occupies one slot on the CDA 7 backplane. Each director
interfaces to the host channels via a SCSI adapter connected to the opposite side of
the backplane.
The Ultra SCSI director contains two advanced microprocessors. Each
microprocessor has two wide-differential SCSI channels. The following figure
illustrates this interface and the channel designations.
NOTE:
When connecting the CDA 7 SCSI cables to the host channels, notice that the
"A" processor channels are on the bottom and the "B" processor channels are on
the top.