HP StorageWorks 2500 Disk System Enclosure User Manual download pdf (Page 13)

1Overview

This chapter includes the following topics:

•

General description, page 13

•

Features, page 13

• Components, page 14

• Status indicators, page 15

•Systemrequirements, page 15

General description

The DS2500 i

s a dual-redundant Fibre Channel (FC) loop storage system used on systems running HP-UX

operating s

ystemsoftware.TheDS2500occupies3EIAunitsinastandard19-inchrack. Upto14

disk drives

can be mounted in the front of the enclosure. Up to 4 DS2500s can be daisy-chained

together to create a storage ring.

Features

The DS2500 disk enclosure provides:

• Redundant power supplies and blowers

Only one operational power supply and one operational blower are required for the DS2500

to function.

• FC disk drives that can be added or replaced with the system on (although the affected file

systems must be taken offline)

• Environmental services sensors that monitor the disk enclosure and provide real-time error

reporting

• High-availability to minimize unplanned downtime

• Customer-replaceable components

Each DS2500 is connected to Host Bus Adapters (HBAs) through two independent Fibre Channel

Arbitrated Loop (FC-AL) buses, also known as loops, to provide no single point of failure (NSPOF). Each

disk drive connects to loop A through I/O module A, and to loop B through I/O module B. Figure 1

shows the maximum configuration of four DS2500s.

The disk enclosure supports high-availability requirements through the following features:

• Hot-pluggable components

• High-capacity, high-speed disks

• Redundant, customer replaceable power supplies and blowers

• Redundant I/O modules

• Support for mirrored disks in the HP-UX environment

• Online firmware upgrades

• Hardware event monitoring and real-time error reporting

2500 Disk System user guide

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HP StorageWorks 2500 Disk System Enclosure User Manual Page 13