In a MetroCluster configuration with native disks and array LUNs, you need FC-to-SAS bridges to connect the Data ONTAP systems with the disk shelves through the FC switches. You can connect array LUNs through the FC switches to the Data ONTAP systems.
A minimum of eight FC initiator ports is required for a Data ONTAP system to connect to both native disks and array LUNs.
The following diagrams represent examples of a MetroCluster configuration with disks and array LUNs. They both represent the same MetroCluster configuration; the representations for disks and array LUNs are separated only for simplification.
In the following configuration diagram that displays the connectivity between Data ONTAP systems and disks, the initiator ports 1a through 1d are used for connectivity with disks through the FC-to-SAS bridges.
In the following configuration diagram that displays the connectivity between Data ONTAP systems and array LUNs, the initiator ports 0a through 0d are used for connectivity with array LUNs because ports 1a through 1d are used for connectivity with disks.
