Changing RAID Level | AMCC 720-0138-00 manual

Chapter 5. Configuring Units

Changing RAID Level

You can use migrate to change the RAID level of an existing unit while the unit is online, without experiencing any data loss. When you change a RAID level, you may also add one or more drives to the unit. You can also migrate to change the unit's stripe size. For example, a four-drive RAID 5 with a 64KB stripe size can be migrated to a four-drive RAID 5 with 256KB stripe size. The steps below describe how to change a RAID level in 3DM2.

Note: Once migration starts, the unit stays in the migrating state until the migration process is complete. The migration process cannot be aborted, and must be allowed to finish before a rebuild or verify to the unit is permitted.

Warning: It is important that you allow migration to complete before adding to the unit. Making physical changes to the unit during migration may cause the migration process to stop, and can jeopardize the safety of your data.

To change the RAID level of a unit

1In 3DM 2, choose Management > Maintenance.

2In the Unit Maintenance table on the Maintenance Page, select the unit for which you wish to change the RAID level, by checking the box next to the Unit ID.

3Click the Migrate Unit button. The Migrate dialog box appears.

4Select any drives to be added to the unit.

5Select the new RAID level.

6Optionally, select a new Stripe size.

7Click OK.

The Maintenance page updates to show the new unit and the Migration progress.

8Inform the operating system of the change, as described below under “Informing the Operating System of Changed Configuration”.

Note: You can only migrate a unit to a RAID level that has the same or more capacity as the existing one. A four-drive RAID 5 unit can migrate to a four-drive RAID 0, but a three-drive RAID 0 unit cannot migrate to a three-drive RAID 5, without adding another drive, due to the need for additional storage capacity for parity bits.

52	3ware Serial ATA RAID Controller User Guide for the Power Mac G5

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AMCC 720-0138-00 manual Changing RAID Level, To change the RAID level of a unit

Contents

3ware Copyright Table of Contents Configuring Units Index Page About this User Guide How this User Guide is OrganizedChapters and Appendices in this User Guide Conventions Screenshots Configure the RAID Unit and Drives Set Up Management and Maintenance Features Getting Started with Your 3ware RAID Controller Initial Settings for Policies and Background Tasks Default Settings for Policies and Background Tasks Introducing the 3ware 9590SE-4ME RAID Controller System Requirements 3ware 9590SE-4ME RAID controllers require the following Understanding RAID Concepts and Levels RAID Concepts Available RAID Configurations RAID RAID 1 Configuration Example Single Disk Hot Spare Using Drive Capacity Efficiently RAID Configuration TypesDetermining What RAID Level to Use Drive Capacity 3ware Tools for Configuration and Management Monitoring, Maintenance, Troubleshooting Features Monitoring, Maintenance, and Troubleshooting Features 3DM 2 3ware Disk Manager Introduction Installing 3DM Browser Requirements for 3DM Uninstalling 3DM on the Macintosh To uninstall 3DMStarting 3DM and Logging Logging In to the 3DM Web Application To log in to the 3DM web application To see if the 3DM process is already running To stop the 3DM process so you can restart it Viewing 3DM Remotely Using a Web Browser To start the 3DM process manuallyTo connect to 3DM2 through your web browser Working with the 3DM Screens DM Main Screen 3DM Menus DM Menu Bar Viewing Information About Different Controllers Refreshing the Screen3DM Screens and What Theyre Used For List of 3DM Pages 3DM Description Setting Up 3DM Preferences Setting and Changing 3DM Passwords To set or change the passwordManaging E-mail Event Notification Enabling and Disabling Remote Access To set up event notificationTo send a test message Setting the Incoming Port # Setting the Frequency of Page RefreshesTo enable or disable remote access To set the incoming port Configuring Your Controller Viewing Information About a ControllerTo see details about a controller in 3DM Controller Summary Viewing Controller Policies To view controller policies in 3DM Setting the Auto Rebuild Policy About Controller Policies Using Auto-Carving for Multi LUN Support To enable Auto Rebuild through 3DMTo use auto-carving Setting the Size of Volumes Created with Auto-Carving To set the carve size in 3DM Configuring Units Configuring a New Unit Configuration Options When Creating a Unit Type of configuration RAID LevelDrives to be included in the unit Name of the unit optional Stripe size, if appropriate for the RAID levelUnit policies Creating a Unit To create a unit Initializing Formatting and Partitioning Units To initialize and partition your unit Disk Insertion Message from the Mac OS Disk Utility Window, select the Partition tab On the right, specify a volume name and then click Partition Creating a Hot Spare Macintosh Disk Utility Showing Partitioning Progress Naming a Unit To specify a hot spareTo name or rename a unit through 3DM Setting Unit Policies Unit Policies on Controller Settings Page in 3DM Enabling and Disabling the Unit Write Cache Setting Auto Verify for a Unit To enable or disable unit write cache through 3DMTo set the Auto Verify policy for an existing unit Setting Continue on Source Error During Rebuild Enabling and Disabling Queuing for a Unit Setting the StorSave Profile for a Unit To enable or disable queuing for a unit through 3DMAbout StorSave Profile Levels StorSave Profile Definitions Setting the StorSave Profile through 3DM To set the StorSave profile through 3DM Changing An Existing Configuration RAID Level Migration RLM Overview Valid Migration Paths Changing RAID Level To change the RAID level of a unit Informing the Operating System of Changed Configuration Expanding Unit CapacityTo expand a unit’s capacity Deleting a Unit To inform the operating system that a unit has been changedTo delete a unit through 3DM Deleting a Unit Through 3DM Removing a Unit To remove a unit through 3DM Moving a Unit from One Controller to Another Adding a Drive Removing a DriveTo add a drive To remove a drive Removing a Drive in 3DM Rescanning the Controller To rescan the controller Maintaining Units Checking Unit and Drive Status Drilling Down to Check Status Information Enclosure LED Status Indicators Unit Statuses Drive Statuses About Degraded Units About Inoperable Units Alarms, Errors, and Other Events Viewing Alarms, Errors, and Other EventsTo view alarms To see an explanation of a specific item Downloading an Error Log To download the error logViewing Smart Data About a Drive To view Smart data Background Tasks About Initialization Initialization of Different RAID TypesInitialization of RAID 0 Units Initialization of RAID 5 Units Background Initialization After Power Failure About VerificationInitialization of RAID 1 and RAID 10 Units What Verification Does Verification of Non-Redundant UnitsVerification of Redundant Units How Errors Are Handled Starting a Verify Manually Rebuilding Units To verify a unit through 3DM Selecting a Drive when Rebuilding To rebuild a unit through 3DM Setting Background Task Rate To change the background task rate Scheduling Background Tasks Background Task Prioritization Viewing Current Task Schedules Scheduled Task DurationTo view the current task schedule Turning On or Off Use of a Task Schedule Selecting Task Schedules to View Removing a Task Schedule Adding a New Task Schedule SlotTo remove a task schedule Selecting Self-tests to be Performed To add a task schedule slotTo select self-tests to be performed To disable self-tests Locating a Drive by Blinking Its LEDTo blink the LED for a drive To blink the LEDs for all drives in a unit Maintaining Your Controller Determining the Current Version of Your 3ware Driver To update the driver and firmware under Mac OS Updating the Driver and FirmwareTo download the driver or firmware 3DM 2 Reference Controller Summary Controller Details Unit Information Unit Information Unit Details Unit Details Drive Information Drive Information Drive Information Drive Details window Extra Drive Information Controller Settings Smart Data Background Task Rate Unit Names DM 2 Reference Scheduling Scheduling Task Schedules Self-test Schedules Maintenance Maintenance Rescan Controller Maintenance Task Buttons Drive Information 102 103 Available Drives to Create Units Create Unit Configuration Window in 3DM Alarms Alarms Battery Backup Enclosure Summary Enclosure Details Enclosure Details 3DM 2 Settings Mail Notification Password Refresh Remote Access Http Settings Troubleshooting Web ResourcesBefore Contacting Customer Support Enclosure-Related Problems Error and Notification Messages Error and Notification Message List Value Message 115 116 Error and Notification Message Details Controller reset occurred Degraded unitController error occurred Rebuild failed Unclean shutdown detected Drive timeout detectedIncomplete unit detected Initialize completed 000A Drive error detected 000B Rebuild started000C Initialize started 000D Unit deleted 000E Initialize failed 000F Smart threshold exceededDrive removed 001A Drive inserted Downgrade Udma mode Upgrade Udma mode001E Unit inoperable 001F Unit Operational Drive ECC error reported Sbuf memory test failedCache flush failed some data lost DCB checksum error detected DCB version unsupportedVerify started 002A Verify failed 002C Source drive ECC error overwritten 002D Source drive error occurred002E Replacement drive capacity too small 002B Verify completed Spare capacity too small for some units Migration startedMigration failed Migration completed Buffer ECC error corrected 003A Drive power on reset detectedSO-DIMM not detected 003B Rebuild paused 003F Flash file system error detected Primary DCB read error occurred003D Verify paused 003E Migration paused Backup DCB read error detected Battery voltage is normalBattery voltage is low Battery voltage is high Battery temperature is normal 004A Battery temperature is low004B Battery temperature is high 004C Battery temperature is too low 004E Battery capacity test started Battery capacity test completedBattery health check started Battery health check completed Battery charging started Battery charging completedBattery charging fault Battery capacity is below warning level 005D Battery health check failed 005E Cache synchronization completed005F Cache synchronization failed some data lost Appendices 134 Glossary Appendix A. Glossary 137 138 139 140 Driver and Software Installation To install the driver and disk management tools Welcome Installation Screen Select Components to Install Screen DM2 Email Configuration Screen DM2 Security Configuration Screen Final Installation Screen 147 Appendix B. Driver and Software Installation 148 Compliance and Conformity Statements FCC Radio Frequency Interference Statement European Community Conformity Statement Warranty, Technical Support, and Service Limited Warranty Warranty Service and RMA Process ExclusionsState Law Provisions Amcc Technical Support and Services Sales and ordering informationFeedback on this manual Appendix D. Warranty, Technical Support, and Service 154 Index 156 157 158 159 160 161 162