112 IBM System Storage N series Hardware Guide
Take care in planning N6210 MetroCluster configurations because the N6210 has only two
Fibre Channel initiator onboard ports and two PCI expansion slots. Because you use one
slot for the FC/VI adapter, you have only one remaining slot for a Fibre Channel initiator
card. Because a minimum of four Fibre Channel ports are needed for Stretch
MetroCluster, the following configurations are possible:
– Two onboard Fibre Channel ports + dual port Fibre Channel initiator adapter
– Quad port FC initiator HBA (frees up onboard Fibre Channel ports)
All slots are in use, and the N6210 cannot be upgraded with other adapters.
When SAS Shelves are used, there is no spindle limit with Fabric MetroCluster and Data
ONTAP 8.x. Only the platform spindle limit applies (N62x0 and N7950T), as shown in
Table 8-3.
Table 8-3 Maximum number of spindles with DOT 8.x and Fabric MetroCluster
Platform Number of spindles SAS/SATA
(requires FibreBridges)
Maximum number of FC disks
N6210 480 480
N6240 600 600
N6270 960 840 (672 with DOT7.3.2 or 7.3.4)
N7950T 1176 840 (672 with DOT7.3.2 or 7.3.4)
Requirement: Fabric MetroClusters need four dedicated FC switches in two fabrics. Each
fabric must be dedicated to the traffic for a single MetroCluster. No other devices can be
connected to the MetroCluster fabric.
Beginning with Data ONTAP 8.1, MetroCluster supports shared-switches configuration
with Brocade 5100 switches. Two MetroCluster configurations can be built with four
Brocade 5100 switches. For more information about shared-switches configuration, see
the Data ONTAP High Availability Configuration Guide.
Attention: Always see the MetroCluster Interoperability Matrix on the IBM Support site for
the latest information about components and compatibility.
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