Manuals / Brands / Computer Equipment / Network Card / Acer / Computer Equipment / Network Card

Acer Series 520 Configuring Physical Drives, Arrays, and Logical Drives, 5.1Configuring SCSI Physical Drives, 5.1.1Basic Configuration Rules, Chapter

1 100

Download 100 pages, 911.71 Kb

Chapter 5

Configuring Physical Drives,

Arrays, and Logical Drives

This chapter explains how to configure SCSI physical drives, arrays, and logical drives. It contains the following sections:

Section 5.1, “Configuring SCSI Physical Drives”

Section 5.2, “Configuring Arrays”

Section 5.3, “Creating Logical Drives”

Section 5.4, “Configuring Logical Drives”

Section 5.5, “Planning the Array Configuration”

5.1Configuring SCSI Physical Drives

Physical SCSI drives must be organized into logical drives. The arrays and logical drives that you construct must be able to support the RAID level that you select. The MegaRAID SCSI 320-0 controller does not have a SCSI channel; the number of SCSI channels depends on the SCSI controller on the motherboard.

5.1.1Basic Configuration Rules

You should observe the following guidelines when connecting and configuring SCSI devices in a RAID array:

You can place up to 15 physical drives in an array, depending on the RAID level.

Include all drives that have the same capacity in the same array.

Make sure any hot spare has a capacity that is at least as large as the largest drive that may be replaced by the hot spare.

When replacing a failed drive, make sure that the replacement drive has a capacity that is at least as large as the drive being replaced.

MegaRAID SCSI 320-0 Hardware Guide

5-1

Copyright © 2002 by LSI Logic Corporation. All rights reserved.

Contents

HARDWARE GUIDE Page FCC Regulatory Statement Warning: Disclaimer – Page Preface Hardware Installation Troubleshooting Audible Warnings Technical Support MegaRAID Problem Report MegaRAID Problem Report Form (Cont.) Logical Drive Configuration Logical Drive Configuration (Cont.) Physical Device Layout Physical Device Layout (Cont.) Page Page Contents Page Configuring Physical Drives, Arrays, and Logical Drives Page Overview 1.1Features 1.2NVRAM and Flash ROM 1.3Single-Endedand Differential SCSI Buses 1.4Maximum Cable Length for SCSI Standards 1.5SCSI Bus Widths and Maximum Throughput 1.6Documentation 1.6.1MegaRAID SCSI 320-0ZCR Hardware Guide 1.6.2MegaRAID Configuration Software Guide 1.6.3MegaRAID Operating System Driver Installation Guide Page Introduction to RAID 2.1RAID Benefits 2.1.1Improved I/O 2.1.2Increased Reliability 2.2MegaRAID SCSI 320-0– Host-BasedRAID Solution 2.2.1Host-BasedRAID 2.2.2SCSI-to-SCSIExternal RAID 2.3RAID Overview 2.3.1Physical Array 2.3.2Logical Drive 2.3.3Consistency Check 2.3.4Fault Tolerance 2.3.5Disk Striping Figure 2.1 Disk Striping 2.3.5.1Stripe Width 2.3.6Disk Mirroring 2.3.7Disk Spanning 2.3.8Parity 2.3.9Hot Spares 2.3.10 Hot Swapping 2.3.11 Disk Rebuild 2.3.12 Logical Drive States 2.3.13 SCSI Drive States 2.3.14 Disk Array Types 2.3.15 Enclosure Management Page RAID Levels 3.1Selecting a RAID Level 3.2RAID 3.3RAID 3.4RAID Figure 3.3 RAID 5 Array 3.5RAID 3.6RAID Figure 3.5 RAID 50 Array Features 4.1SMART Technology 4.2Configuration on Disk 4.3Configuration Features 4.4Array Performance Features 4.5RAID Management Features 4.6Fault Tolerance Features 4.7Software Utilities 4.8Operating System Software Drivers 4.9MegaRAID SCSI 320-0Specifications 4.9.1PCI Bridge/CPU 4.9.2Cache Memory 4.9.3MegaRAID BIOS 4.9.4SCSI Firmware 4.10 RAID Management 4.10.1MegaRAID BIOS Configuration Utility 4.10.2 WebBIOS Configuration Utility 4.10.3 Power Console Plus 4.10.4 MegaRAID Manager 4.11 Compatibility 4.11.1Server Management 4.11.2 SCSI Device Compatibility 4.11.3 Software Page Configuring Physical Drives Arrays, and Logical Drives 5.1Configuring SCSI Physical Drives 5.1.1Basic Configuration Rules 5.1.2Current Physical Device Configuration 5.1.3Logical Drive Configuration Page 5.1.4Physical Device Layout Table 5.3 Physical Device Layout (Cont.) Page 5.2Configuring Arrays 5.2.1Arranging Arrays 5.2.2Creating Hot Spares 5.3Creating Logical Drives 5.3.1Configuration Strategies Capacity for RAID Levels (Cont.) 5.3.1.2Maximizing Drive Availability Fault Tolerance for RAID Levels 5.3.1.3Maximizing Drive Performance 5.3.2Assigning RAID Levels 5.4Configuring Logical Drives 5.4.1Optimizing Data Storage 5.5Planning the Array Configuration 5.5.1Using the Array Configuration Planner Array Configuration Planner Array Configuration Planner (Cont.) Page Hardware Installation 6.1Hardware Requirements 6.2Installation Steps 6.2.1Step 1: Unpack 6.2.2Step 2: Power Down 6.2.3Step 3: Set Jumpers Figure 6.1 MegaRAID SCSI 320-0Controller Layout 6.2.3.1J2 Dirty Cache LED 6.2.3.2J3 Clear EPROM 6.2.3.3J4 BIOS Enable Table 6.3 Pinout for J4 BIOS Enable 6.2.4Step 4: Install MegaRAID SCSI 6.2.5Step 5: Power Up 6.2.6Step 6: Run the MegaRAID BIOS Configuration Utility 6.2.7Step 7: Install the Operating System Driver 6.3Summary Troubleshooting 7.1General Troubleshooting General Problems and Suggested Solutions (Cont.) 7.2BIOS Boot Error Messages 7.3Other BIOS Error Messages 7.4Other Potential Problems Other Potential Problems (Cont.) Appendix A Audible Warnings Page Appendix B Glossary Channel Consistency Check Cold Swap Data Transfer Disk Subsystem Double Buffering Failed Drive Fast SCSI Firmware Host Computer Hot Spare Hot Swapping I/O Driver Initialization Mbyte Multi-threaded Operating Environment Parity Partition RAID RAID Migration Read-Ahead Ready State Rebuild Redundancy Replacement Unit SAF-TE SCSI Service Provider SNMP Spanning Spare Striping Ultra320 Virtual Sizing Wide SCSI Page Index Page Page Page Customer Feedback Reader’s Comments