Chapter 4 Connecting Your Fibre Channel Array 4-13
4.6.1.2 Sun StorEdge 3511 FC Array
Drive channels 2 and 3 are dedicated drive channels. Configured for redundancy,
each drive channel of the top I/O controller module shares a loop with the matching
drive channel on the bottom I/O controller module. For example, drive channel 2 of
the top I/O controller module shares the same loop as channel 2 on the bottom I/O
controller module (see
FIGURE 4-8). Each drive channel has two SFP ports that can be
connected to expansion units. Drive channels 2 and 3 access all the disk drives using
internal FC-SATA routing technology and are interconnected to load-balance I/O
operations.
FIGURE 4-8 Dedicated Drive Channels 2 and 3 (on Both Controllers) in a Dual-Controller Sun StorEdge
3511 FC Array
4.6.2 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 Sun StorEdge 3510 and 3511 FC arrays are the
number of host ports and the supported speed for each port (see
TABLE 4-4).
Two drive ports on channel 2
Two drive ports on channel 3
An upper port and a lower port are on each drive channel.
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