Compaq Infortrend manual Array Expansion, What is it and how does it work?

Chapter

12

Array Expansion

The array expansion functions allow you to expand storage capacity without the costs on buying new equipment. The expansion can be completed on-line while system is serving host I/Os.

This chapter is organized as follows:

12. 1 Overview

Note on using the expansion functions 12.2 Mode 1 Expansion

Theory and configuration procedure: expansion by adding drives

12.3 Mode 2 Expansion

Theory and configuration procedure: expansion by copying and replacing drives

12.4 Making Use of the Added Capacity

Configuration procedure of the Expand function for logical drive

12.5 Expand Logical Volume

Configuration procedure of the Expand function for logical volume

12.6Configuration Example: Volume Extension in Windows 2000

12.1Overview

What is it and how does it work?

Before the invention of RAID Expansion, increasing the capacity of a RAID system meant backing up all data in the disk array, re-creating disk array configuration with new drives, and then restoring data back into system.

Infortrend’s RAID Expansion technology allows users to expand a logical drive by adding new drives, or replacing drive members with drives of larger capacity. Replacing is done by copying data

Advanced Configurations 12-1