Chapter 4: Controller Connections and Operation
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
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 I2C interface as displayed in Figure 4-3. Controller firmware has embedded utilities to help configure these devices.
Controller Integration |