HP 166207-B21 Advanced Data Guarding Option Software Reference Guide
HP 166207-B21 - Smart Array 5302/32 RAID Controller Manual
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- HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 1
Compaq Advanced Data Guarding Option Software Reference Guide Part Number 283954-001 May 2002 (First Edition) - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 2
the express limited warranty statements accompanying such products. Nothing herein should be construed as constituting an additional warranty. Compaq Advanced Data Guarding Option Software Reference Guide May 2002 (First Edition) Part Number 283954-001 - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 3
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 2-9 Optimizing the Stripe Size 2-9 Compaq Advanced Data Guarding Option Software Reference Guide iii - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 4
Contents iv Compaq Advanced Data Guarding Option Software Reference Guide - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 5
About This Guide This guide provides step-by-step instructions for installation, and reference information for operation, troubleshooting, and future upgrades for the Compaq Advanced Data Guarding Option Software. Symbols in Text These symbols may be found in the text of this guide. They have the - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 6
Help If you have a problem and have exhausted the information in this guide, you can get further information and other help in the following locations. Compaq Technical Support In North America, call the Compaq Technical Support Phone Center at 1-800-OK-COMPAQ. This service is available 24 hours - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 7
call 1-800-263-5868. • Elsewhere, see the Compaq website for locations and telephone numbers. Reader's Comments Compaq welcomes your comments on this guide. Please send your comments and suggestions by email to [email protected]. Compaq Advanced Data Guarding Option Software Reference - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 8
. B1 B3 P5,6 Q7,8 B2 P3,4 Q5,6 B7 P1,2 Q3,4 B5 B8 Q1,2 B4 B6 P7,8 Figure 1-1: Array using RAID ADG, showing data blocks (B) and two parity data sets (P, Q) RAID ADG also makes efficient use of drive space in the logical volume. Compaq Advanced Data Guarding Option Software Reference Guide 1-1 - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 9
Methods Table 1-1 summarizes the most important features of the different RAID methods that are supported by Compaq array controllers. For more detailed information, refer to the user guide for the Smart Array controller that is installed in the system. Table 1-1: Comparison of RAID Methods RAID - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 10
each other. The risk of such mutually mirrored drives failing decreases as the number of mirrored pairs in the array increases. • A RAID 5 logical drive (with no online spare) fails if two physical drives fail. • further decreased. Compaq Advanced Data Guarding Option Software Reference Guide 1-3 - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 11
5 RAID 1+0 RAID ADG Increasing likelihood of logical drive failure > > > 1 6 11 16 21 26 31 36 41 46 51 56 Total number of physical drives in array Figure 1-2: Relative probability of logical drive failure for different RAID levels 1-4 Compaq Advanced Data Guarding Option Software Reference - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 12
ADG RAID 5 (RAID 0 if fault tolerance is not required) RAID 5 (RAID 0 if fault tolerance is not required) RAID 1+0 Compaq Advanced Data Guarding Option Software Reference Guide 1-5 - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 13
of features in the array controller user guide to confirm that the array controller supports RAID ADG, and confirm that the array accelerator has a server. (This step is required, for example, if the controller is a Smart Array 5300 with a current firmware version less than 2.72.) NOTE: If the - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 14
; both are equally suitable. Most of the configuration instructions described in the remaining sections of this chapter assume that you are using ACU. NOTE: For more detailed information about ACU, refer to the user guide provided with the array controller. For more detailed information about ACU-XE - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 15
to the user guide for the array controller that the support logical drives that are larger than 502 GB. Refer to the operating system documentation for details. Configuring a New System Windows NT and Windows 2000 There are three main steps to configure a new system for RAID ADG: 1. Set up an array - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 16
that are to be used as online spares. 5. Click the Assign Spare to Array button in the lower middle part of the screen. 6. Click Done to activate menu. NetWare 1. Visit the Novell website and check that the latest support pack or operating system patch is installed on the system. 2. Reference Guide - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 17
RAID 5, you must expand the array. If the logical drive has Windows NT and Windows 2000 Expanding the Array 1. Add at least one extra hard the array to be expanded from the configuration view box. 5. Click Expand in the Array box . 7. Click the Assign Drive to Array button in the upper middle part of - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 18
the latest support pack or array expansion has finished, select the logical drive that you want to migrate to RAID ADG and press the Enter key. 7. Select Drive Settings on the Logical Drive menu. 8. Select RAID ADG from the list. 2-6 Compaq Advanced Data Guarding Option Software Reference Guide - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 19
only if both controllers support RAID ADG. If the new controller supports RAID ADG but does array on the controller. • Share one online spare among several arrays any logical drives in the array. For example, a logical array operates as the spare for every fault-tolerant logical drive within the array - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 20
3. Select the controller from the drop-down list on the main ACU screen. 4. Select the array. 5. Click Modify in the Array box. 6. Select the drives that are to be used as online spares. IMPORTANT: The capacity of reads and writes. 2-8 Compaq Advanced Data Guarding Option Software Reference Guide - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 21
improve system performance if you change this setting. NOTE: RAID operations use 32 MB of the cache. 1. Double-click the ACU icon on the desktop from the drop-down list on the main ACU screen. 3. Select the array in the configuration view window. 4. Click Settings in the Controller box. 5. Guide 2-9 - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 22
Given RAID Level Fault-tolerance Level RAID 0 or 1+0 RAID 5 or ADG Supported Stripe Sizes (KB) 8, 16, 32, 64, 128, 256 8, 16, 32, 64 Default (KB) 128 16 Table 2-2: Optimum Stripe Size Type of Exit on the Controller menu. 2-10 Compaq Advanced Data Guarding Option Software Reference Guide - HP 166207-B21 | Advanced Data Guarding Option Software Reference Guide - Page 23
System Setup NetWare 1. Visit the Novell website and be sure that the latest support pack or operating system patch is installed on the system. 2. Visit the Compaq website Drive menu. 6. Select a stripe size. 7. Save the changes. Compaq Advanced Data Guarding Option Software Reference Guide 2-11
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Compaq Advanced Data Guarding
Option Software
Reference Guide
Part Number 283954-001
May 2002 (First Edition)