Filter
Top Products
Chapter 4: Controller Connections and Operation
Controller Integration 4-5
4.2.3 Expansion
The installation of an optional daughter board can expand the number of available SCSI-
320 I/O channels by four. With the addition of the daughter board, the SR 170 will then
have eight SCSI-320 channels available. These expansion channels are connected in the
same way as described above. They can all be configured as either host or drive channels.
4.3. Controller Integration
Figure 4-3: Drive Channel and Host Channel Connection
Figure 4-3 above is an example of connecting the RAID controller to the drives and the
host computer. Since all channels can be configured as host or drive channels, a variety
of host and drive configurations are available. The on-board terminator has been enabled
on the controller side of the I/O channels. On the other end of the SCSI cable, an external
terminator is applied. Termination on all SCSI drives should be disabled.
Integrators may choose a different interface for the enclosure device management.
Connect remote devices (sensors for fan rotation, power supply, temperature, etc.,
connected through a chip) on a SCSI bus (SAF-TE) or via the I
2
C interface as displayed
in Figure 4-3. Controller firmware has embedded utilities to help configure these
devices.