NonStop NS1000 Planning Guide (H06.06+)

Modular System Hardware

HP Integrity NonStop NS1000 Planning Guide—542527-002

5-16

Enterprise Storage System

An Enterprise Storage System (ESS) is a collection of magnetic disks, their controllers,

and the disk cache in one or more standalone cabinets. ESS connects to the Integrity

NonStop NS1000 system either directly via FCSAs in an IOAM enclosure (direct

connect) or through a separate storage area network (SAN) using a Fibre Channel

SAN switch (switched connect). For more information about these connection types,

see the Fibre Channel ServerNet Adapter Installation and Support Guide.

High availability and a fault-tolerant configuration for one IOAM enclosure and pairs of

FCSAs are similar to the configurations required for Fibre Channel disk drives, as

explained in IOAM Enclosure and Disk Storage Considerations on page 6-9.

Cables and switches vary, depending on whether the connection is direct, switched, or

a combination:

This illustration shows an example of connections between two IOAM enclosures and

an ESS via the separate Fibre Channel switch:

For fault tolerance, the primary and backup paths to an ESS logical device (LDEV)

must go through different Fibre Channel switches.

Connection LC-LC Cables Fibre Channel Switches

Direct-connect 2 per FCSA 0

Switched 4 per FCSA 1 or more

Combination of

direct and switched

2 per FCSA for each direct connection

4 per FCSA for each switched connection

VST068.vsd

Fibre

Channel

Switch

ESS

IOA M

Enclosure

Fibre Channel

Switch

IOA M

Enclosure

FCSA