Users Guide

This example shows a fully redundant fabric configuration. If a Fibre Channel (FC) switch or HBA fails, the

alternate switch still connects to both storage RAID Controller Modules in the storage array. If a storage

RAID Controller Module also fails, the ESXi host can still access the remaining RAID Controller Module,

and all virtual disks fail over to that RAID Controller Module. A complete loss of access to storage occurs

if any other element fails.

Figure 69. Single failure

Figure 70. Double failure

This method works well to maintain access to the data in case of a hardware failure; however, MRU only

maintains one active path for each HBA group. Therefore, if you have an ESXi host with four HBAs, only