Dot Hill Systems II 200 FC - Manual (Page 67)

Chapter 4 Connecting Your Array 4-19
Figure 4-13 Dedicated Drive Channels 2 and 3 (on Both Controllers) in a Dual-Controller SANnet
II 200 SATA Array
4.8.2 Host Port Connectivity in a Dual-Controller Array
Host channels connect to host computers either directly or through storage switches or
other devices. In a default dual-controller RAID configuration, each controller has four
host channels, channels 0, 1, 4, and 5. Port bypass circuits connect each pair of host
SFP ports on a host channel; as a result, each host channel accesses both controllers.
The main differences between the SANnet II 200 FC, SATA, and SATA SE arrays are
the number of host ports and the supported speed for each port (see Table 4-6).
4.8.2.1 SANnet II 200 FC Array
In a default dual-controller RAID configuration, each controller has four host ports.
Each port connects to one host channel, channels 0, 1, 4, and 5 (see Figure 4-14). All
four host channels support 1-Gbit or 2-Gbit data transfer speeds. Each host channel has
un upper port and a lower port.
Table 4-6 Number of Host Ports and Supported Host Port Speeds
Data Transfer
Speed
SANnet II 200 FC Array SANnet II 200 SATA and SATA SE Array
1 Gbit or 2-Gbit Maximum of 4 host ports per
I/O controller module Maximum of 4 host ports (FC 0 and FC 1)
per I/O controller module
2 Gbit only N/A Maximum of 2 host ports (FC 4 and FC 5)
per I/O controller module
Two drive ports on channel 2
Two drive ports on channel 3
An upper port and a lower port are on each drive channel.