Manuals / Brands / Computer Equipment / Software / HP / Computer Equipment / Software

HP Tru64 UNIX 4.x Figure F-1:Relative probability of logical drive failure

1 77

Download 77 pages, 1.16 Mb

Probability of Logical Drive Failure

Increasing likelihood of logical drive failure > > >

RAID 0

RAID 5

RAID 1+0

RAID ADG

Total number of physical drives in array

Figure F-1: Relative probability of logical drive failure

F-2	HP Smart Array 641/642 Controller User Guide

Contents

Page Page Contents About This Guide Chapter Installation Overview Installing the Hardware Updating the Firmware Setting the Controller Order Configuring an Array Installing the Device Drivers and Management Agents Upgrading or Replacing the Cache Appendix B Electrostatic Discharge Appendix C Controller Specifications Appendix D Appendix F Probability of Logical Drive Failure Appendix G Troubleshooting Index About This Guide Symbols in Text Related Documents Getting Help Technical Support HP Website Authorized Reseller Reader’s Comments Installation Overview Procedure for a Preconfigured System Figure 1-2:Controller installation in an already configured system Installing the Hardware Installing the Smart Array Controller Connecting the Cables Internal Cabling External Cabling (Model 642 only) Table 2-1:External SCSI Cables for Storage Enclosures Updating the Firmware Express Custom System Configuration Utility Ctrl+Alt+Del Setting the Controller Order Boot Controller Order Esc F10 Configuring an Array Table 5-1:Comparison of Utilities for Configuring an Array Using ACU Using CPQONLIN Running CPQONLIN Array Configuration Utility Automatic Configuration Custom Configuration Manual Configuration Figure 5-3:Main manual configuration screen Logical Configuration View Table 5-2:Menu Options in CPQONLIN Typical Manual Configuration Procedures in CPQONLIN Creating a Custom Configuration for a New Array Create Array, Physical Drives New Array Adding Spare Drives Assign Spare Tab Assign Spare Array Options Configuring the New Logical Drive Stripe Size Configuring the Controller Settings Controller Settings low Figure 5-4:Controller Settings screen Expanding an Array Expand Priority Array Accelerator OK Disable Cache Enable Cache Expand Accept Changes Migrating RAID Level or Stripe Size Drive Settings Installing the Device Drivers and Management Agents Page Upgrading or Replacing the Cache Regulatory Compliance Notices Page Modifications Cables Canadian Notice (Avis Canadien) Mouse Compliance Statement European Union Notice Japanese Notice Taiwanese Notice Battery Replacement Notice Electrostatic Discharge Page Controller Specifications Drive Arrays and Fault Tolerance logical drives block stripes drive array array any all fault tolerance online spare hot spare Fault-ToleranceMethods RAID 0—NoFault Tolerance Advantages Disadvantages RAID 1+0—DriveMirroring load balancing RAID 5—DistributedData Guarding parity data rebuild Page RAID ADG—AdvancedData Guarding Disadvantage Comparison of RAID Methods Table D-1:Summary of RAID Methods Other Fault-ToleranceOptions Software-based RAID Controller Duplexing Hard Drive Installation and Replacement Recognizing Drive Failure Table E-1:Hard Drive Status from LED Illumination Pattern Compromised Fault Tolerance Procedure to Attempt Recovery Automatic Data Recovery Failure of Automatic Data Recovery General Aspects of Drive Replacement Page Drive Failure During Rebuild Minimizing Fatal System Errors During Rebuild and Moving Drives and Arrays required Upgrading Hard Drive Capacity Expanding and Extending Capacity Array capacity expansion logical drive capacity extension Probability of Logical Drive Failure Figure F-1:Relative probability of logical drive failure Troubleshooting Index