Dot Hill Systems II 200 FC service manual SANnet II 200 SATA and SATA SE Arrays

	Host channel 4	Host channel 5
Host channel 0	Host channel 1

An upper port and a lower port are on each host channel.

Figure 4-14Host Channels on a Dual-Controller SANnet II 200 FC Array

4.8.2.2SANnet II 200 SATA and SATA SE Arrays

In a default dual-controller SANnet II 200 SATA and SATA SE RAID configuration, each controller has six host ports, as shown in Figure 4-15:

■Two host ports connect to channel 0 (FC 0)

■Two host ports connect to channel 1 (FC 1)

■One host port connects to channel 4 (FC 4)

■One host port connects to channel 5 (FC 5)

Channels 0 and 1 support 1-Gbit or 2-Gbit data transfer speeds. Channels 4 and 5 support 2-Gbit data transfer speeds only.

If a fabric switch is connected to one port of channel 0 or channel 1, no connections can be made with the other three ports of that channel. If channel 0 (FC 0) is connected to a fabric switch, for example, the second port for channel 0 on that controller, and both ports on a redundant controller cannot be used. Similarly, if channel 1 (FC 1) is connected to a fabric switch, the second port on that controller and the two FC 1 ports on a redundant controller cannot be used.

Two hosts can be directly connected to either channel 0 (ports FC 0) or channel 1 (ports FC 1), but in that configuration, host filters are required if you want to control host access to storage. Each host channel has an upper port and a lower port.

4-20SANnet II 200 FC, SATA, and SATA SE Array Installation, Operation, and Service Manual • March 2005