321 Studios GHDX2-2430S-24F4D manual Fault-tolerant data paths

Chapter 4: Subsystem Connection and Operation

Data Path Connection	Fault-tolerant data paths
Host Channel Bandwidth	1600 MB/s
Max. Number of Drives	24

The onboard hub can be disabled so that individual host ports provide access to individual RAID controllers.

•This is a SAN storage application using two (2) host channels through four

(4) separate FC links from individual RAID controllers.

•Path bypass redundancy is provided externally by a fabric switch.

•Depending on switch port configuration, change your FC host-side protocol through firmware utilities to fit the connection type either to the N_ports or the NL_ports as specified by your FC switches.

•Access management software can be implemented to direct data flow through an existing host link if one of the data paths fails. The precondition is that an array should also be available through the host ID/LUNs on another host link.

CAUTION!

Figure 3-10: Faulty Connections in a Public Loop

Please DO NOT connect the cascade ports of a single host channel on a RAID controller to two different FC switches. A public loop contains only one FL_port, and hence the second FL_port will become non-functional.

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