Compaq ProLiant 1000 User Guide: Online Storage Controller Recovery Option - Page 27

Multiple Controller Pairs

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2-9 ProLiant Storage 1 System 2 /F or /U 1 ProLiant Storage 1 System 2 /F or /U 2 Active Standby Device Driver Figure 2-3. Dual-Channel Controller Pair -- Logical Diagram Multiple Controller Pairs An OSCRO multiple controller pair configuration would be required in an installation that needs mass storage controller redundancy for more than 14 spindles of data. A controller pair in a multiple controller pair configuration can be a single-channel or dual-channel pair. The capability to define multiple controller pairs extends the configurable size of the fault-tolerant I/O subsystem. With increased flexibility comes an increased need for planning and care during configuration and installation. Online Storage Controller Recovery Option User Guide

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2-9
Online Storage Controller Recovery Option User Guide
ProLiant
Storage
System
/F or /U
1
ProLiant
Storage
System
/F or /U
2
1
2
1
2
Device
Drive
r
Standby
Active
Figure 2-3.
Dual-Channel Controller Pair -- Logical Diagram
Multiple Controller Pairs
An OSCRO multiple controller pair configuration would be required in an
installation that needs mass storage controller redundancy for more than 14
spindles of data. A controller pair in a multiple controller pair configuration
can be a single-channel or dual-channel pair. The capability to define multiple
controller pairs extends the configurable size of the fault-tolerant I/O
subsystem. With increased flexibility comes an increased need for planning
and care during configuration and installation.