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System Overview

22 NAS 4000s and 9000s Administration Guide

NAS Server as a Single Device

In the single NAS device configuration, a NAS server is attached to a SAN via a single or pair

of fiber channel host bus adapters (HBAs) and one or more SAN switches. In Figure 1, the

dual HBA approach is illustrated. Each HBA should be connected to a separate switch that has

access to the same controller pairs. This connection method allows redundant paths to the

same storage subsystem. Dual HBAs per NAS device is recommended but not required for

stand alone deployments, since dual HBAs allow for path failure while still providing access to

the data.

SAN storage is not managed by the NAS server and requires coordination between the NAS

administrator and the SAN administrator. LUN requests need to be made and assigned to the

NAS server using selective storage presentation from the SAN controller pairs. Naming of the

LUNs and the connections to the NAS server is important for tracking and identification

purposes. At least one LUN is required by the NAS server for the device to be functional.

Figure 1: NAS server as a single device

SAN Switch

Storage Area Network

Data RAID set

LUN 1

Data RAID set

LUN 2

++++++++++++++++++++

HBA 1

HBA 2

SAN Switch

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HP 4000S Guia do Utilizador Página 22