Dot Hill Systems service manual SANnet II 200 FC Array Drive Ports

Note – The SANnet II 200 SATA SE array configuration does not include drive ports.

4.8.1.1SANnet 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.

Two ports on channel 3

Two drive ports on channel 2

Figure 4-12Dedicated 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.

4.8.1.2SANnet 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.

4-18SANnet II 200 FC, SATA, and SATA SE Array Installation, Operation, and Service Manual • March 2005