This topic provides information on how to set up a highly available SAN failover configuration with an ESXi host and DS4800 storage.
You must have the following hardware components:
Two FC HBAs, such as QLogic or Emulex, on each ESXi machine.
Two FC switches connecting the HBAs to the SAN (for example, FC switch 1 and FC switch 2).
Two SPs (for example, SP1 and SP2).
Each SP must have at least two ports connected to the SAN.
Use the following connection settings for the ESXi host, as shown in SAN Failover:
Connect each HBA on each ESXi machine to a separate switch. For example, connect HBA1 to FC switch 1 and HBA2 to FC switch 2.
This configuration provides two paths from each HBA, so that each element of the connection can fail over to a redundant path. The order of the paths in this configuration provides HBA and switch failover without the need to trigger SP failover. The storage processor that the preferred paths are connected to must own the LUNs. In the preceding example configuration, SP1 owns them.
The preceding example assumes that the switches are not connected through an Inter-Switch Link (ISL) in one fabric.