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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

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Dot Hill Systems SANnet II 200 Manual de servicio Pagina 66