Direct-attached stand-alone configuration--257 to 336 LUNs

Connectivity overview

The following information is for a direct-attached stand-alone configuration of 257 to 336 LUNs. The illustration and table show the number of ports and cable connections required for storage subsystem models that support 256 LUNs per port or 256 LUNs per host group per port.

Ports and connections	Number
gFiler HBA ports used	4
Storage subsystem ports used	4
Total cable connections	4

Notes to the illustration:

All connected ports on a gFiler have access to all LUNs for that gFiler. The minimum number of ports for storage system models that support 256 LUNs per port are included in the illustration.
The gFiler is limited to one host group per port and the maximum number of LUNs per host group in that port.
- For storage subsystem models that cannot support more than 256 LUNs per host group per port, you must add another redundant port pair on the storage subsystem to obtain the 336 LUNs. You cannot just add another host group on the existing port for the gFiler to increase the number of LUNs.
- For the XP12000, only one redundant port pair is required.
NetApp recommends that LUNs be distributed equally over the redundant port pairs for load balancing.

Port-to-port connectivity

The following table summarizes the port-to-port connectivity scheme for the previous illustration of between 257 and 336 LUNs.

Port-to-port connectivity scheme
gFiler	Storage subsystem
1A	CL1-A
1B	CL1-B
2A	CL2-B
2B	CL2-A