Multi-Path Software, Virtual Disk Recovery | Dell MD3620I, MD3600I

Virtual Disk Recovery

You can use the Edit host server-to-virtual disk mappings feature to recover data from the backup virtual disk. This functionality enables you to unmap the original source virtual disk from its host server, then map the backup virtual disk to the same host server.

Ensure that you record the LUN used to provide access to the source virtual disk. You need this information when you define a host server-to-virtual disk mapping for the target (backup) virtual disk. Also, be sure to stop all I/O activity to the source virtual disk before beginning the virtual disk recovery procedure.

Using Snapshot and Disk Copy Together

You can use the Snapshot Virtual Disk and Virtual Disk Copy premium features together to back up data on the same storage array, or to restore the data on the snapshot virtual disk to its original source virtual disk.

You can copy data from a virtual disk in one of two ways:

•By taking a point-in-time snapshot of the data

•By copying the data to another virtual disk using a virtual disk copy

You can select a snapshot virtual disk as the source virtual disk for a virtual disk copy. This configuration is one of the best ways you can apply the snapshot virtual disk feature, since it enables complete backups without any impact to the storage array I/O.

You cannot use a snapshot repository virtual disk as a source virtual disk or as a target virtual disk in a virtual disk copy. If you select the source virtual disk as the target virtual disk of a virtual disk copy, you must disable all snapshot virtual disks associated with the source virtual disk.

Multi-Path Software

Multi-path software (also referred to as the failover driver) is the software resident on the host server that provides management of the redundant data path between the host server and the storage array. For the multi-path software to correctly manage a redundant path, the configuration must have redundant iSCSI connections and cabling.

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Planning: MD3600i Series Storage Array Terms and Concepts

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Dell MD3620I, MD3600I owner manual Multi-Path Software, Virtual Disk Recovery, Using Snapshot and Disk Copy Together

Contents

Dell PowerVault MD3600i and MD3620i Storage Arrays December Contents Cache Functions and Features Planning RAID Controller Modules Virtual Disk Operations Limit Configuring Alert Notifications Out-of-Band and In-Band Management Edit, Remove, or Rename Host Topology Enabling or Disabling the Event Monitor 103 Managing Host Port Identifiers 104107 130 117126 Host-to-Virtual Disk Mapping 131 146 143145 147 Creating a Virtual Disk Copy for ContentsRe-Creating a Snapshot Virtual Disk Virtual Disk Copy Restrictions 179 Using DM Multipathing Devices 186Stopping a Virtual Disk Copy 178 Preparing Host Servers 179 210 Downloading Both RAID Controller209 211 227 RAID Controller Module Backup Battery Unit 222Power Supply/Cooling Fan Module 224 229 241 Recovering From an Unresponsive237 242 Troubleshooting Expansion Enclosure Management Modules 265 Safety First-For you and Your Array 263Troubleshooting Power 264 Troubleshooting a Damaged Array 270 272 Contents Introduction About This Document Dell PowerVault Modular Disk Storage Manager Dell PowerVault Modular Disk Configuration UtilityMD3600i Series Storage Array Other Information You May Need Introduction Planning About Your Storage Array Overview Hardware Features Front-Panel Features and Indicators Planning About Your Storage Array Item Indicator, Button, or Icon Description Connector Back-Panel Features and Indicators Hard-Drive Indicator Patterns Hard Drive Indicators Power Supply and Cooling Fan Features Hard-Drive Status Indicator Pattern Condition Power Indicator Codes Power Indicator Codes Item LED Type Icon Description Planning RAID Controller Modules RAID Controller Modules RAID Controller Module Connectors and Features MD3600i Series iSCSI RAID Controller Module Item Component Function Storage Array Thermal Shutdown RAID Controller Module-Additional FeaturesBattery Backup Unit Shutdown Threshold Type Cache Mirroring Cache Functions and FeaturesSystem Password Reset Write-Back Cache Write-Through Cache Planning MD3600i Series Storage Array Terms and Concepts Physical Disks, Virtual Disks, and Disk Groups Physical Disks Physical Disk States Self-Monitoring Analysis and Reporting Technology Virtual Disks and Disk Groups Virtual Disk States RAID Controller Virtual Disk States Description RAID Levels RAID Level Usage RAID Virtual Disk Initialization Segment SizeVirtual Disk Operations Background Initialization Cycle Time Consistency CheckMedia Verification Foreground Initialization Disk Group Operations Virtual Disk Operations LimitRAID Level Migration Segment Size Migration Virtual Disk Capacity ExpansionDisk Group Expansion RAID Background Operations Priority Disk Group DefragmentationDisk Group Operations Limit Virtual Disk Migration and Disk Roaming Disk Migration Planning MD3600i Series Storage Array Terms and Concepts Disk Roaming Host Server-to-Virtual Disk Mapping Advanced Features Host Types Snapshot Virtual Disks Snapshot Repository Virtual Disk Virtual Disk Copy Source Virtual DiskTarget Virtual Disk Virtual Disk Recovery Using Snapshot and Disk Copy TogetherMulti-Path Software Preferred and Alternate Controllers and Paths Virtual Disk Ownership Load Balancing Monitoring MD3600i Series System Performance Planning MD3600i Series Storage Array Terms and Concepts Performance Monitor Table Description Column Headings Planning MD3600i Series Storage Array Terms and Concepts Configuration Overview User Interface Enterprise Management Window Inheriting the System Settings Array Management Window Configuration Overview Configuration About Your Storage Array Out-of-Band and In-Band ManagementOut-of-Band Management Storage Arrays Adding Storage ArraysIn-Band Management Automatic Discovery of Storage Arrays Manual Addition of a Storage ArraySelect Edit→ Add Storage Array Setting Up Your Storage Array Configuration About Your Storage Array Naming or Renaming Storage Arrays AMW Setup tab, select Rename Storage ArrayLocating Storage Arrays AMW, select Storage Array→ Blink→ Storage Array Setting a Password Name/Rename Storage Arrays dialog appears Password Type the New passwordPassword Guidelines Viewing Storage Array Connections Adding/Editing a Comment to an Existing Storage ArraySelect Edit→ Comment Enabling Premium Features Removing Storage ArraysSelect Edit→ Remove→ Storage Array Changing the Cache Settings on the Storage Array Displaying Failover Alert Changing Expansion Enclosure ID Numbers Changing the Enclosure Order in the Physical PaneAMW, select Storage Array→ Change→ Enclosure Order Select Configure Alerts Configuring Alert NotificationsConfiguring E-mail Alerts Select All storage arrays Configuration About Your Storage Array Configuration About Your Storage Array Configuring Snmp Alerts Battery Settings Setting the Storage Array RAID Controller Module Clocks Select Manage iSCSI Settings Configuration Using iSCSIChanging the iSCSI Target Authentication Enter the Target Chap secret Click OK in the Manage iSCSI Settings window Entering Mutual Authentication PermissionsSelect the Mutual Authentication tab Creating Chap Secrets Valid Characters for Chap Secrets Initiator Chap SecretTarget Chap Secret Valid Ascii Characters for Chap Secrets Select the Target Identification tab Changing the iSCSI Target Discovery SettingsChanging the iSCSI Target Identification Select the Target Discovery tab Configuring the iSCSI Host Ports Configuration Using iSCSI Advanced iSCSI Host Ports Settings Advanced iSCSI Host Port Settings Description Viewing or Ending an iSCSI Session Viewing iSCSI Statistics and Setting Baseline Statistics Click Set Baseline Edit, Remove, or Rename Host Topology Mappings→ Move Configuration Event Monitor Enabling or Disabling the Event Monitor WindowsLinux Configuration About Your Host Configuring Host Access Using the Mappings Tab Defining a Host Select Mappings→ Define→ Host Removing Host Access Select Mappings→ Remove Select Mappings→ Define→ Host Group Managing Host GroupsCreating a Host Group Adding a Host to a Host Group Select Mappings→ Move Moving a Host to a Different Host GroupRemoving a Host From a Host Group Move Host Confirmation dialog appears Removing a Host Group Host Topology101 Windows Starting or Stopping the Host Context AgentLinux Click Action→ Start Data Path Protection 103 Managing Host Port Identifiers Add Host Port Identifier dialog appears104 105 106 Configuration Disk Groups and Virtual Disks Creating Disk Groups and Virtual Disks107 Creating Disk Groups Introduction Create Disk Group window is displayed108 109 Locating a Disk Group Creating Virtual Disks 111 Changing the Virtual Disk Modification Priority 112 Changing the Virtual Disk Cache Settings 113 114 Changing the Segment Size of a Virtual Disk Select Virtual Disk→ Change→ Segment Size115 Changing the I/O Type File system typical Database Multimedia Custom116 Choosing an Appropriate Physical Disk Type Physical Disk Security with Self Encrypting Disk117 118 Save Security Key File Validate Security Key Unlock Drives 119 Creating a Security Key 120 121 Changing a Security Key Click Create Key122 Confirm Change Security Key window is displayed 123 Saving a Security Key Click Change Key124 Validate Security Key Unlocking Secure Physical Disks125 Configuring Hot Spare Physical Disks Erasing Secure Physical Disks126 Select Physical disk→ Hot Spare Coverage Hot Spare Physical Disk Options window is displayed127 Click Unassign Hot Spares and RebuildGlobal Hot Spares 128 Hot Spare Operation Hot Spare Drive Protection129 Enclosure Loss Protection 130Criteria for Enclosure Loss Protection RAID Level Host-to-Virtual Disk Mapping 131 Creating Host-to-Virtual Disk Mappings 132 Modifying and Removing Host-to-Virtual Disk Mapping 133 Changing Controller Ownership of the Virtual Disk 134 Removing Host-to-Virtual Disk Mapping Select Virtual Disk→ Change→ Ownership/Preferred Path135 Select Disk Group→ Change→ Ownership/Preferred Path 136 Select Disk Group→ Change→ RAID Level Restricted MappingsChanging the RAID Level of a Disk Group 137 138 139 140 Changing the RAID Level of a Disk Group Storage Partitioning141 142 Disk Group and Virtual Disk Expansion Select Disk Group→ Add Free Capacity Physical Disks143 Virtual Disk Expansion Using Free CapacityUsing Unconfigured Capacity 144 Exporting a Disk Group Disk Group MigrationExport Disk Group Non-Exportable Components Import Disk Group Importing a Disk Group146 Storage Array Media Scan Non-Importable Components147 Changing Media Scan Settings 148 Suspending the Media Scan 149 150 Configuration Premium Feature- Snapshot Virtual Disks 151 152 Creating a Snapshot Virtual Disk Using the Simple Path About the Simple Path153 154 155 Creating a Snapshot Virtual Disk Using the Advanced Path About the Advanced Path156 157 158 159 Automatic Map later with Storage Partition Creating the Snapshot Using the Advanced PathSpecify Virtual Disk Parameters window is displayed 160 Specifying Snapshot Virtual Disk Names 161 162 Snapshot Repository Capacity 163 Click Add Physical Disks 164 Add Physical Disks window closes 165 Select Virtual Disk→ Snapshot→ Re-create Re-Creating Snapshot Virtual DisksDisabling a Snapshot Virtual Disk 166 Preparing Host Servers to Re-Create a Snapshot Virtual Disk 167 Re-Creating a Snapshot Virtual Disk Select Virtual Disk → Snapshot→ Re-create168 Configuration Premium Feature- Virtual Disk Copy 169 Creating a Virtual Disk Copy for an Mscs Shared Disk 170 Virtual Disk Read/Write Permissions 171 Virtual Disk Copy Restrictions Creating a Virtual Disk Copy172 Before you Begin Virtual Disk Copy and Modification Operations173 Failed Virtual Disk Copy Preferred RAID Controller Module OwnershipCreate Copy Wizard 174 Copying the Virtual Disk Failed RAID Controller ModuleCopy Manager 175 176 Setting Copy Priority Storage Array Performance During Virtual Disk Copy177 Stopping a Virtual Disk Copy Select Change→ Copy Priority178 Recopying a Virtual Disk Preparing Host Servers to Recopy a Virtual Disk179 Recopying the Virtual Disk 180 Removing Copy Pairs Select Copy→ Re-Copy181 182 183 184 Configuration Device Mapper Multipath for Linux 185 Using DM Multipathing Devices Prerequisites186 Device Mapper Configuration Steps 187 Scan for Newly Added Virtual Disks 188 Create a New fdisk Partition on a Multipath Device Node 189 Dev/mapper/mpathx-party Add a New Partition to Device MapperDev/mapper/mpathxpy Dev/mapper/mpathxparty Mount a Device Mapper Partition Linux Host Server Reboot Best PracticesCreate a File System on a Device Mapper Partition Ready For Use Useful Device Mapper Commands Description Important Information About Special Partitions192 Limitations and Known Issues 193 Troubleshooting 194Question Answer 195 196 Downloading RAID Controller and Nvsram Packages 197 Downloading Both RAID Controller and Nvsram Firmware 198 Click Transfer 199 200 Downloading Only Nvsram Firmware 201 202 Downloading Physical Disk Firmware 203 204 Download Environmental EMM Firmware dialog appears AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownloading MD1200 Series Expansion Module EMM Firmware 205 Self-Monitoring Analysis and Reporting Technology Smart 206 Media Errors and Unreadable Sectors 207 208 Management Installing Array Components Recommended Tools209 Removing the Front Bezel Installing the Front BezelFront Bezel Optional 210 Removing a Drive Blank Safety Models AMT, E03J, and E04JHard Drives 211 Installing a Drive Blank Removing a Hard Drive212 Removing and Installing a Hard Drive 213 Installing a Hard Drive 214 Removing a Hard Drive From a Hard-Drive Carrier 215 216 Removing a RAID Controller Module Blank Installing a Hard Drive Into a Drive CarrierRAID Controller Module 217 Installing a RAID Controller Module Blank 218 Removing a RAID Controller Module 219 Installing a RAID Controller Module Opening the RAID Controller Module220 Closing the RAID Controller Module 221 RAID Controller Module Backup Battery Unit Removing the RAID Controller Module Backup Battery Unit222 Installing the RAID Controller Module Backup Battery Unit 223 Power Supply/Cooling Fan Module Removing a Power Supply/Cooling Fan Module224 225 Installing a Power Supply/Cooling Fan Module 226 Control Panel Removing the Control Panel227 Installing the Control Panel 228 Backplane Removing the Backplane229 230 16. Removing and Installing the Backplane-PowerVault MD3600i 17. Removing and Installing the Backplane-PowerVault MD3620i Installing the Backplane 232 Management Firmware Inventory Viewing the Firmware Inventory233 234 Volume Shadow-Copy Service Microsoft ServicesVirtual Disk Service Management System Interfaces 236 Device Health Conditions Troubleshooting Your Storage Array SoftwareStart-Up Routine 237 On the Setup tab, select Manage a Storage Array 238Status Icon Description 239 Additional Status Icons Description 240 Enter the Execution summary Storage Array Support DataAutomatically Collect the Support Bundle Data 241 Retrieving Trace Buffers 242 243 Collecting Physical Disk Data Collect Physical Disk Data window is displayed244 Event Log 245 Select Storage Array→ View→ Profile Recovery GuruStorage Array Profile 246 247 Viewing the Logical Associations Viewing the Physical Associations248 Finding Nodes 249 Click Find Next Using Go ToSelect Find all free capacity nodes 250 Recovering From an Unresponsive Storage Array Condition 251 252 253 Locating a Physical Disk 254 Locating an Expansion Enclosure Select Physical Disk→ Blink→ Expansion Enclosure255 Capturing the State Information 256 SMrepassist Utility 257 Recovering From an Unidentified Storage Array Unidentified Devices258 259 260 Starting or Restarting the Host Context Agent Software 261 262 Troubleshooting External Connections Troubleshooting Your ArrayTroubleshooting Loss of Communication 263 Troubleshooting Power Supply/Cooling Fan Module 264 Troubleshooting Array Cooling Problems Troubleshooting Expansion Enclosure Management Modules265 Troubleshooting RAID Controller Modules 266 267 Troubleshooting Hard Drives 268 Troubleshooting Array and Expansion Enclosure Connections Troubleshooting a Wet Storage Array269 Troubleshooting a Damaged Array 270 Invalid Storage Array ECC ErrorsConditions 271 Noncritical Conditions PCI ErrorsCritical Conditions 272 Visit support.dell.com Getting HelpContacting Dell Click All Support from Support menu 274 Index 275 276 277 278 Smart 279 280 281 282