HP StorageWorks 2500 HP StorageWorks 2500 Disk System User Guide (5697-5922, N - Page 13

Overview, General description, Features

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1 Overview This chapter includes the following topics: • General description, page 13 • Features, page 13 • Components, page 14 • Status indicators, page 15 • System requirements, page 15 General description The DS2500 is a dual-redundant Fibre Channel (FC) loop storage system used on systems running HP-UX operating system software. The DS2500 occupies 3 EIA units in a standard 19-inch rack. Up to 14 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 13

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1 Overview
This chapter includes the following topics:
•
General description
, page 13
•
Features
, page 13
•
Components
, page 14
•
Status indicators
, page 15
•
System requirements
, page 15
General description
The DS2500 is a dual-redundant Fibre Channel (FC) loop storage system used on systems running HP-UX
operating system software. The DS2500 occupies 3 EIA units in a standard 19-inch rack. Up to 14
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
13