HP NAS 4000s, Administration Manual

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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
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HBA 1
HBA 2
SAN Switch