Dot Hill Systems II 200 FC - Manual (Page 66)

4-18 SANnet II 200 FC, SATA, and SATA SE Array Installation, Operation, and Service Manual • March 2005
Note –
The SANnet II 200 SATA SE array configuration does not include drive ports.
4.8.1.1 SANnet II 200 FC Array Drive Ports
Configured for redundancy, each controller in a dual-controller RAID array has two
adjacent dedicated drive channels on one loop to load balance I/O operations (see
Figure 4-12). Each drive channel has two SFP ports that can be connected to expansion
units. Drive channels 2 and 3 access all the disk drives and are interconnected to load-
balance I/O operations. Each drive channel has an upper and lower port.
Figure 4-12 Dedicated Drive Channels 2 on the Upper Controller and 3 on the Lower Controller in
a Dual-Controller SANnet II 200 FC Array
The I/O controller module in slot A (the upper slot) houses drive channel 2, which
connects to the 12 internal disk drives through their A ports. The I/O controller module
in slot B (the lower slot) houses drive channel 3, which connects to the 12 internal disk
drives through their B ports.
4.8.1.2 SANnet II 200 SATA Array Drive Ports
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 4-13). 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.
Two drive ports on channel 2
Two ports on channel 3