Overview, General description, Features – HP StorageWorks 2500 Disk System User Manual
Page 13: 1 overview
1 Overview
This chapter includes the following topics:
• Features
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.
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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