Dell MD3200, MD3220 owner manual Restricted Mappings, Changing the RAID Level of a Disk Group, 122

Page 122

Changing the RAID Level of a Disk Group

Changing the RAID level of a disk group changes the RAID levels of every virtual disk that comprises the disk group. Performance might be slightly affected during the operation.

Guidelines to change the RAID level of a disk group:

•You cannot cancel this operation after it begins.

•The disk group must be in Optimal status before you can perform this operation.

•Your data remains available during this operation.

•If you do not have enough capacity in the disk group to convert to the new RAID level, an error message appears, and the operation does not continue. If you have unassigned physical disks, use the Disk Group>> Add Free Capacity (Physical Disks) option to add additional capacity to the disk group. Then retry the operation.

To change the RAID level of a disk group:

1In the AMW, select the Logical tab and select a disk group.

2Select Disk Group→ Change→ RAID Level.

3Select the appropriate RAID level and click Yes to confirm the selection. The RAID level operation begins.

Restricted Mappings

Many hosts are able to map up to 256 logical unit numbers (LUNs) (0 to 255) per storage partition. However, the maximum number of mappings differs because of operating system variables, failover driver issues, and potential data problems. The hosts listed in the table have these mapping restrictions.

If you try to map a virtual disk to a LUN that exceeds the restriction on these operating systems, the host is unable to access the virtual disk.

Operating System	Highest LUN

Windows Server 2003 and Windows server 2008	255
Linux	255

Guidelines when you work with host types with LUN mapping restrictions:

122

Configuration: Disk Groups and Virtual Disks

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Contents Dell PowerVault MD3200 and MD3220 Storage Arrays May Contents Cache Functions and Features Planning MD3200 Series Storage Array Terms and ConceptsVirtual Disk Operations Limit Configuring Alert Notifications Out-of-Band and In-Band ManagementEnabling or Disabling the Event Monitor Managing Host Port IdentifiersHost-to-Virtual Disk Mapping Configuring Hot Spare Physical DisksPhysical Disk Security with Self Encrypting 122 Creating a Snapshot Virtual Disk UsingSnapshot Using the Simple Path 137 125Creating a Virtual Disk Copy for an Mscs 145Re-creating a Snapshot Virtual Disk 152 154160 Using DM Multipathing Devices 168159 161177 Media Errors and Unreadable Sectors 187Downloading RAID Controller and Nvsram 178202 Power Supply/Cooling Fan Module 204197 206Storage Array Support Data 220 Recovering From an Unresponsive Storage 229217 221Troubleshooting Loss of Communication Safety First-For you and Your ArrayTroubleshooting Storage Array Startup Failure Troubleshooting External Connections253 Introduction About This DocumentDell PowerVault MD3200 Series Storage Array Dell PowerVault Modular Disk Storage ManagerOther Information you May Need Introduction Planning About Your Storage Array OverviewHardware Features Front-Panel Features and IndicatorsPlanning About Your Storage Array Item Indicator, Button, or Icon Description Connector Back Panel Features and Indicators Hard-Drive Indicator Patterns Hard Drive IndicatorsPower Supply and Cooling Fan Features Drive-Status Indicator Pattern ConditionPower Indicator Codes Power Indicator Codes Item LED Type Icon DescriptionPlanning RAID Controller Modules RAID Controller ModulesRAID Controller Module Connectors and Features FunctionItem Component Function Component Function RAID Controller Module-Additional FeaturesBattery Backup Unit Shutdown Threshold Type System Password ResetStorage Array Thermal Shutdown Event DescriptionWrite-Back Cache Cache Functions and FeaturesCache Mirroring Write-Through CachePlanning MD3200 Series Storage Array Terms and Concepts Physical Disks, Virtual Disks, and Disk GroupsPhysical Disks Physical Disk StatesSelf-Monitoring Analysis and Reporting Technology Virtual Disks and Disk GroupsRAID Controller Virtual Disk States Description RAID LevelsVirtual Disk States RAID Level Usage RAIDRAID Virtual Disk Initialization Segment SizeVirtual Disk Operations Background InitializationCycle Time Consistency CheckMedia Verification RAID Level Migration Disk Group OperationsVirtual Disk Operations Limit Segment Size MigrationVirtual Disk Capacity Expansion Disk Group ExpansionDisk Group Operations Limit RAID Background Operations PriorityDisk Group Defragmentation Virtual Disk Migration and Disk Roaming Disk MigrationPlanning MD3200 Series Storage Array Terms and Concepts Advanced Features Disk RoamingSnapshot Virtual Disks Host Server-to-Virtual Disk MappingHost Types Snapshot Repository Virtual Disk Source Virtual Disk Virtual Disk RecoveryVirtual Disk Copy Target Virtual DiskUsing Snapshot and Disk Copy Together Multi-Path SoftwarePreferred and Alternate Controllers and Paths Virtual Disk OwnershipLoad Balancing Monitoring MD3200 Series System Performance Performance Monitor Table Description Column Headings For more information, see the online help topics Planning MD3200 Series Storage Array Terms and Concepts Configuration Overview User InterfaceEnterprise Management Window Select Inherit system settings for color and font Inheriting the System SettingsSelect Tools→ Inherit System Settings Array Management WindowConfiguration Overview Out-of-Band Management Configuration About Your Storage ArrayOut-of-Band and In-Band Management In-Band Management Storage ArraysAdding Storage Arrays Select Edit→ Add Storage Array Automatic Discovery of Storage ArraysManual Addition of a Storage Array Setting Up Your Storage Array Locating Storage Arrays AMW, select Storage Array→ Blink→ Storage ArrayNaming or Renaming Storage Arrays Name/Rename Storage Arrays dialog appearsType the New password Setting a PasswordPassword Password Guidelines Viewing Storage Array ConnectionsSelect Edit→ Comment Adding/Editing a Comment to an Existing Storage ArrayRemoving Storage Arrays Select Edit→ Remove→ Storage ArrayEnabling Premium Features Failover Alert DisplayChanging the Enclosure Order in the Physical Pane Changing the Cache Settings on the Storage ArrayChanging Expansion Enclosure ID Number AMW, select Storage Array→ Change→ Enclosure Order Configuring Alert NotificationsSelect Configure Alerts Select All storage arraysConfiguring E-mail Alerts Configuration About Your Storage Array Configuring Snmp Alerts Battery Settings Setting the Storage Array RAID Controller Module Clocks Configuration About Your Storage Array Configuration Event Monitor Linux Enabling or Disabling the Event MonitorWindows Configuration About Your Host Configuring Host AccessSelect Mappings→ Define→ Host Using the Mappings TabDefining a Host Configuration About Your Host Creating a Host Group Removing Host AccessManaging Host Groups Select Mappings→ RemoveRemoving a Host From a Host Group Moving a Host to a Different Host GroupAdding a Host to a Host Group Select Mappings→ MoveRemoving a Host Group Host TopologyWindows Starting or Stopping the Host Context AgentLinux Data Path Protection Click Action→ StartManaging Host Port Identifiers Add Host Port Identifier dialog appearsConfiguration About Your Host Configuration Disk Groups and Virtual Disks Creating Disk Groups and Virtual DisksCreating Disk Groups Introduction Create Disk Group window is displayedConfiguration Disk Groups and Virtual Disks Locating a Disk Group Creating Virtual DisksConfiguration Disk Groups and Virtual Disks Map later Using Mappings View Changing the Virtual Disk Modification PriorityChanging the Virtual Disk Cache Settings 100 Changing the Segment Size of a Virtual Disk 101102 Changing the I/O TypeSelect Virtual Disk→ Change→ Segment Size 103 Choosing an Appropriate Physical Disk TypeFile system typical Database Multimedia Custom Physical Disk Security with Self Encrypting Disk 104105 Creating a Security Key 106Click Create Key 107108 Changing a Security KeyConfirm Change Security Key window is displayed 109 Saving a Security KeyClick Change Key Unlocking Secure Physical Disks 110111 Configuring Hot Spare Physical DisksErasing Secure Physical Disks 112 Select Physical disk→ Hot Spare CoverageHot Spare Physical Disk Options window is displayed Click Unassign Hot Spares and RebuildGlobal Hot Spares 113114 Hot Spare OperationHot Spare Drive Protection Criteria for Enclosure Loss Protection RAID Level Enclosure Loss Protection115 Host-to-Virtual Disk Mapping 116Creating Host-to-Virtual Disk Mappings 117Modifying and Removing Host-to-Virtual Disk Mapping 118Changing Controller Ownership of the Virtual Disk 119120 Removing Host-to-Virtual Disk MappingSelect Virtual Disk→ Change→ Ownership/Preferred Path Select Disk Group→ Change→ Ownership/Preferred Path 121Select Disk Group→ Change→ RAID Level Restricted MappingsChanging the RAID Level of a Disk Group 122123 124 Changing the RAID Level of a Disk Group 125Storage Partitioning 126127 128 Disk Group and Virtual Disk ExpansionSelect Disk Group→ Add Free Capacity Physical Disks Virtual Disk Expansion Using Free CapacityUsing Unconfigured Capacity 129Exporting a Disk Group Disk Group MigrationExport Disk Group Non-Exportable Components131 Import Disk GroupImporting a Disk Group 132 Storage Array Media ScanNon-Importable Components Changing Media Scan Settings 133Suspending the Media Scan 134Configuration Premium Feature- Snapshot Virtual Disks 135Creating a Snapshot Virtual Disk Using the Simple Path 136About the Simple Path 137138 139 140 Creating a Snapshot Virtual Disk Using the Advanced PathAbout the Advanced Path 141 142 Creating the Snapshot Using the Advanced Path 143Specify Virtual Disk Parameters window is displayed 144Specifying Snapshot Virtual Disk Names 145Snapshot Repository Capacity 146147 148 Click Add Physical DisksAdd Physical Disks window closes 149 Re-creating Snapshot Virtual DisksSelect Virtual Disk→ Snapshot→ Re-create Disabling a Snapshot Virtual Disk 150Preparing Host Servers to Re-create a Snapshot Virtual Disk 151152 Re-creating a Snapshot Virtual DiskSelect Virtual Disk → Snapshot→ Re-create Configuration Premium Feature- Virtual Disk Copy 153Creating a Virtual Disk Copy for an Mscs Shared Disk 154155 Virtual Disk Read/Write PermissionsVirtual Disk Copy Restrictions Creating a Virtual Disk Copy 156Create Copy Wizard Before you BeginVirtual Disk Copy and Modification Operations 157Failed Virtual Disk Copy Preferred RAID Controller Module OwnershipFailed RAID Controller Module 158159 Copy ManagerCopying the Virtual Disk Storage Array Performance During Virtual Disk Copy 160Select Change→ Copy Priority Setting Copy PriorityStopping a Virtual Disk Copy 161162 Recopying a Virtual DiskPreparing Host Servers to Recopy a Virtual Disk Recopying the Virtual Disk 163164 Removing Copy PairsSelect Copy→ Re-Copy 165 166 Configuration Device Mapper Multipath for Linux 167168 Using DM Multipathing DevicesPrerequisite Steps 169 Device Mapper Configuration StepsScan for Newly Added Virtual Disks 170 171 Create a New fdisk Partition on a Multipath Device NodeAdd a New Partition to Device Mapper Ready for Use Create a File System on a Device Mapper PartitionMount a Device Mapper Partition Important Information About Special PartitionsDevice Mapper Commands Descriptions 173Limitations and Known Issues 174QuestionAnswer Troubleshooting175 176 Downloading RAID Controller and Nvsram Packages 177Downloading Both RAID Controller and Nvsram Firmware 178Click Transfer 179Downloading Only Nvsram Firmware 180181 Select Tools→ Upgrade RAID Controller Module FirmwareUpgrade RAID Controller Module Firmware window appears 182 Downloading Physical Disk Firmware 183184 Download Environmental EMM Firmware dialog appears AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownloading MD1200 Series Expansion Module EMM Firmware 185Self-Monitoring Analysis and Reporting Technology Smart 186Media Errors and Unreadable Sectors 187188 189 Management Installing Array ComponentsRecommended Tools Removing the Front Bezel Installing the Front BezelFront Bezel Optional 190Removing a Drive Blank Safety Models AMT, E03J, and E04JHard Drives 191192 Installing a Drive BlankRemoving a Hard Drive Removing and Installing a Hard Drive 193Installing a Hard Drive 194Removing a Hard Drive From a Hard-Drive Carrier 195196 Removing a RAID Controller Module Blank Installing a Hard Drive Into a Drive CarrierRAID Controller Module 197Installing a RAID Controller Module Blank 198Removing a RAID Controller Module 199200 Installing a RAID Controller ModuleOpening the RAID Controller Module Closing the RAID Controller Module 201202 RAID Controller Module Backup Battery UnitRemoving the RAID Controller Module Backup Battery Unit Installing the RAID Controller Module Backup Battery Unit 203204 Power Supply/Cooling Fan ModuleRemoving a Power Supply/Cooling Fan Module Installing a Power Supply/Cooling Fan Module 205206 Control PanelRemoving the Control Panel 207 Installing the Control Panel 208209 BackplaneRemoving the Backplane 210 16. Removing and Installing the Backplane-PowerVault MD3200 17. Removing and Installing the Backplane-PowerVault MD3220Installing the Backplane 212213 Management Firmware InventoryViewing the Firmware Inventory 214 Volume Shadow-Copy Service Microsoft ServicesVirtual Disk Service Management System Interfaces216 Device Health Conditions Troubleshooting Your Storage Array SoftwareStart-Up Routine 217Status Icon Description On the Setup tab, select Manage a Storage Array218 219 Additional Status Icons DescriptionStorage Array Support Data 220221 Automatically Collect the Support Bundle DataEnter the Execution summary 222 Collecting the Physical Disk DataEvent Log Recovery Guru 223224 Storage Array ProfileSelect Storage Array→ View→ Profile 225 226 Viewing the Logical AssociationsViewing the Physical Associations Finding Nodes 227Click Find Next Using Go ToSelect Find all free capacity nodes 228Recovering From an Unresponsive Storage Array Condition 229230 231 Locating a Physical Disk 232233 Locating an Expansion EnclosureSelect Physical Disk→ Blink→ Expansion Enclosure Capturing the State Information 234SMrepassist Utility 235236 Recovering From an Unidentified Storage ArrayUnidentified Devices 237 238 Starting or Restarting the Host Context Agent Software 239240 Troubleshooting External Connections Troubleshooting Your ArrayTroubleshooting Loss of Communication 241Troubleshooting Power Supply/Cooling Fan Module 242243 Troubleshooting Array Cooling ProblemsTroubleshooting Expansion Enclosure Management Modules Troubleshooting RAID Controller Modules 244245 Troubleshooting Hard Drives 246Troubleshooting Array and Expansion Enclosure Connections 247Troubleshooting a Wet Storage Array 248249 Troubleshooting a Damaged ArrayConditions Invalid Storage Array ECC ErrorsPCI Errors Critical ConditionsNoncritical Conditions 251252 Visit support.dell.com Getting HelpContacting Dell Click All Support from Support menu254 Index 255256 257 258 259 260

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