Advanced Data Guarding Option Software Reference Guide

Compaq Advanced Data Guarding Option Software Reference Guide iii
COMPAQ CONFIDENTIAL
Writer: John Turner File Name: a-frnt
Codename: adg2 Part Number: 283954-001 Last Saved On: 5/22/02 12:40 PM
Contents
About This Guide
Symbols in Text...................................................................................................................v
Text Conventions .............................................................................................................. vi
Getting Help ...................................................................................................................... vi
Compaq Technical Support......................................................................................... vi
Compaq Website........................................................................................................ vii
Compaq Authorized Reseller..................................................................................... vii
Reader’s Comments ......................................................................................................... vii
Chapter 1
Overview of RAID ADG
Comparing RAID ADG to Other RAID Methods........................................................... 1-2
Probability of Logical Drive Failure......................................................................... 1-3
Choosing a RAID Method............................................................................................... 1-5
Chapter 2
System Setup
Enabling RAID ADG ...................................................................................................... 2-1
Configuring the System with RAID ADG ...................................................................... 2-3
Configuring a New System....................................................................................... 2-3
Migrating an Existing Logical Drive to RAID ADG................................................ 2-5
Migrating a RAID ADG Volume to Another Controller.......................................... 2-7
Assigning Online Spares after System Configuration..................................................... 2-7
Performance Tuning ........................................................................................................ 2-8
Changing the Cache Read/Write Ratio ..................................................................... 2-9
Optimizing the Stripe Size ........................................................................................ 2-9