Re-creating Snapshot Virtual Disks, Snapshot Rollback | Dell MD3220

Re-creating Snapshot Virtual Disks

You can re-create a snapshot virtual disk that you have previously disabled.

CAUTION: Possible loss of data redundancy – If the snapshot virtual disk is in Optimal status, it is first disabled prior to being re-created. This action invalidates the current snapshot.

Keep these important guidelines in mind when you re-create a snapshot virtual disk:

•To re-create the snapshot virtual disks correctly, follow the instructions for your operating system.

NOTE: Failing to follow these additional instructions could create unusable snapshot virtual disks. For more information, see the PowerVault Modular Disk Storage Manager online help topics.

•To use this option, the snapshot virtual disk must be either in an Optimal status or Disabled status.

•When using this option, the previously configured snapshot name parameters and snapshot repository virtual disk are used.

To recreate the snapshot virtual disk:

1In the AMW, select the Logical tab, select a snapshot virtual disk.

2Select Virtual Disk→ Snapshot→ Re-create.

3Type yes, and click OK.

Snapshot Rollback

The snapshot rollback feature allows you to revert the contents of a virtual disk to match a point-in-time image existing on a snapshot virtual disk.

During a rollback, the host server can still write data to the base virtual disk. However, the snapshot virtual disk is set as read-only during the rollback operation and becomes available for write operations immediately after the rollback is complete. The snapshot virtual disk cannot be restarted, deleted, or disabled during the rollback operation.

Configuration: Premium Feature—Snapshot Virtual Disks

157

Image 157

Dell MD3220, MD3200 Re-creating Snapshot Virtual Disks, Snapshot Rollback, Select Virtual Disk→ Snapshot→ Re-create, 157

Contents

Dell PowerVault MD3200 and MD3220 Storage Arrays Page Contents Cache Functions and Features RAID Controller Module Connectors Virtual Disk Operations Limit Out-of-Band and In-Band Management Configuring Alert Notifications Managing Host Port Identifiers Enabling or Disabling the Event MonitorCreating Disk Groups and Virtual Disks Physical Disk Security with Self Configuring Hot Spare Physical DisksHost-to-Virtual Disk Mapping 129 126130 131 Creating a Snapshot Virtual Disk Using Creating a Snapshot Virtual Disk Using 142146 151 161 160Types of Virtual Disk Copies 164 165 174 Using DM Multipathing Devices 180176 179 201 Self-Monitoring Analysis and Reporting202 203 Power Supply/Cooling Fan Module 216 RAID Controller Module Backup Battery Unit 214218 221 232 Recovering From an Unresponsive Storage 241233 Collecting the Physical Disk Data 234 Troubleshooting Power Supply/Cooling 254 Safety First-For you and Your Array 253Troubleshooting Expansion Enclosure Troubleshooting a Damaged Array 261 Getting Help Contacting Dell Index Contents About This Document Introduction Other Information you May Need Dell PowerVault Modular Disk Storage ManagerMD3200 Series Storage Array Introduction Introduction Overview Planning About Your Storage Array Front-Panel Features and Indicators Hardware Features Planning About Your Storage Array Item Indicator, Button, or Icon Description Connector Back Panel Features and Indicators Hard Drive Indicators Hard-Drive Indicator Patterns Drive-Status Indicator Pattern Condition Power Supply and Cooling Fan Features Power Indicator Codes and Features RAID Controller Modules Planning RAID Controller Modules Function RAID Controller Module Connectors and Features Item Component Function Battery Backup Unit RAID Controller Module-Additional FeaturesComponent Function Storage Array Thermal Shutdown System Password ResetShutdown Threshold Type Event Description Cache Mirroring Cache Functions and FeaturesWrite-Back Cache Write-Through Cache Physical Disks, Virtual Disks, and Disk Groups Planning MD3200 Series Storage Array Terms and Concepts Physical Disk States Physical Disks Virtual Disks and Disk Groups Self-Monitoring Analysis and Reporting Technology Virtual Disk States RAID LevelsRAID Controller Virtual Disk States Description RAID RAID Level Usage RAID Virtual Disk Operations Segment SizeVirtual Disk Initialization Background Initialization Media Verification Consistency CheckCycle Time Virtual Disk Operations Limit Disk Group OperationsRAID Level Migration Segment Size Migration Disk Group Expansion Virtual Disk Capacity Expansion Disk Group Defragmentation RAID Background Operations PriorityDisk Group Operations Limit Disk Migration Virtual Disk Migration and Disk Roaming Planning MD3200 Series Storage Array Terms and Concepts Disk Roaming Advanced Features Host Types Host Server-to-Virtual Disk MappingSnapshot Virtual Disks Snapshot Repository Virtual Disk Source Virtual Disk Virtual Disk CopyTarget Virtual Disk Using Snapshot and Disk Copy Together Virtual Disk RecoveryMulti-Path Software Virtual Disk Ownership Preferred and Alternate Controllers and Paths Load Balancing AMW, select Storage Array→ Monitor Performance Monitoring MD3200 Series System Performance Click Settings Performance Monitor Table Description Column Headings Planning MD3200 Series Storage Array Terms and Concepts User Interface Configuration Overview Enterprise Management Window Array Management Window Inheriting the System Settings Configuration Overview Out-of-Band and In-Band Management Configuration About Your Storage ArrayOut-of-Band Management Adding Storage Arrays Storage ArraysIn-Band Management Manual Addition of a Storage Array Automatic Discovery of Storage ArraysSelect Edit→ Add Storage Array Setting Up Your Storage Array AMW, select Storage Array→ Blink→ Storage Array Locating Storage Arrays Naming or Renaming Storage Arrays AMW Setup tab, select Rename Storage ArrayName/Rename Storage Arrays dialog is displayed Password Setting a PasswordType the New password Viewing Storage Array Connections Password Guidelines Removing Storage Arrays Adding/Editing a Comment to an Existing Storage ArraySelect Edit→ Comment Select Edit→ Remove→ Storage Array Failover Alert Display Enabling Premium Features Changing Expansion Enclosure ID Number Changing the Cache Settings on the Storage ArrayChanging the Enclosure Order in the Physical Pane Select Configure Alerts Configuring Alert NotificationsAMW, select Storage Array→ Change→ Enclosure Order Select All storage arrays Configuring E-mail Alerts Configuration About Your Storage Array Configuring Snmp Alerts Configuration About Your Storage Array Battery Settings Setting the Storage Array RAID Controller Module Clocks Configuration Event Monitor Windows Enabling or Disabling the Event MonitorLinux Configuring Host Access Configuration About Your Host Defining a Host Using the Mappings TabSelect Mappings→ Define→ Host Configuration About Your Host Managing Host Groups Removing Host AccessCreating a Host Group Select Mappings→ Remove Adding a Host to a Host Group Moving a Host to a Different Host GroupRemoving a Host From a Host Group Select Mappings→ Move Host Topology Removing a Host Group Linux Starting or Stopping the Host Context AgentWindows Click Action→ Start Data Path Protection Add Host Port Identifier dialog is displayed Managing Host Port Identifiers Configuration About Your Host Creating Disk Groups and Virtual Disks Configuration Disk Groups and Virtual Disks Introduction Create Disk Group window is displayed Creating Disk Groups Configuration Disk Groups and Virtual Disks Creating Virtual Disks Locating a Disk Group Configuration Disk Groups and Virtual Disks Changing the Virtual Disk Modification Priority Map later Using Mappings View100 101 Changing the Virtual Disk Cache Settings 102 103 Changing the Segment Size of a Virtual Disk Select Virtual Disk→ Change→ Segment Size Changing the I/O Type104 File system typical Database Multimedia Custom Choosing an Appropriate Physical Disk Type105 106 Physical Disk Security with Self Encrypting Disk 107 Shows how to interpret the security status of a disk group 108 Creating a Security Key 109 Click Create Key Confirm Change Security Key window is displayed Changing a Security Key110 Click Change Key Saving a Security Key111 112 Validate Security Key Erasing Secure Physical Disks Unlocking Secure Physical Disks113 Select Physical disk→ Hot Spare Coverage Configuring Hot Spare Physical Disks114 Hot Spare Physical Disk Options window is displayed Hot Spares and RebuildClick Unassign 115 Hot Spare Operation Global Hot SparesHot Spare Drive Protection 116 117 Enclosure Loss Protection Criteria for Enclosure Loss Protection RAID Level 118 Creating Host-to-Virtual Disk Mappings Host-to-Virtual Disk Mapping119 120 121 Modifying and Removing Host-to-Virtual Disk Mapping Removing Host-to-Virtual Disk Mapping Changing Controller Ownership of the Virtual DiskSelect Virtual Disk→ Change→ Ownership/Preferred Path 122 123 Select Disk Group→ Change→ Ownership/Preferred Path Changing the RAID Level of a Disk Group Removing a Host-to-Virtual Disk Mapping Using Linux DmmpSelect Disk Group→ Change→ RAID Level 124 125 126 Restricted MappingsOperating System Highest LUN 127 128 129 Changing the RAID Level of a Disk Group 130 Storage Partitioning Select Disk Group→ Add Free Capacity Physical Disks Disk Group and Virtual Disk Expansion131 Virtual Disk Expansion Using Free Capacity132 Disk Group Migration Using Unconfigured CapacityExport Disk Group Non-Exportable Components Exporting a Disk Group Import Disk GroupImporting a Disk Group 134 135 Non-Importable Components Storage Array Media Scan Changing Media Scan Settings136 137 Suspending the Media Scan 138 139 Configuration Premium Feature- Snapshot Virtual Disks Common Reasons for Scheduling a Snapshot Virtual Disk Scheduling a Snapshot Virtual Disk140 141 Guidelines for Creating Snapshot Schedules Enabling and Disabling Snapshot Schedules Creating a Snapshot Virtual Disk Using the Simple PathScheduled Snapshot Icons 142 143 About the Simple Path 144 145 About the Advanced Path Creating a Snapshot Virtual Disk Using the Advanced Path146 147 148 149 Creating the Snapshot Using the Advanced Path 150 Specify Virtual Disk Parameters window is displayed 151 Specifying Snapshot Virtual Disk Names 152 Snapshot Repository Capacity 153 Add Physical Disks window closes Click Add Physical Disks154 155 Disabling a Snapshot Virtual Disk 156 Preparing Host Servers to Re-create a Snapshot Virtual Disk Snapshot Rollback Re-creating Snapshot Virtual DisksSelect Virtual Disk→ Snapshot→ Re-create 157 158 Rules and Guidelines for Performing a Snapshot Rollback Protecting Against a Failed Snapshot Rollback Command Line OptionsPrevious Versions of the MD Storage Manager Starting a Snapshot Rollback Rollback Resuming a Snapshot RollbackConfirm Rollback Snapshot Virtual Disk dialog is displayed 160 161 Canceling a Snapshot Rollback 162 163 Configuration Premium Feature- Virtual Disk Copy Offline Copy Types of Virtual Disk Copies164 165 Online Copy Virtual Disk Read/Write Permissions Creating a Virtual Disk Copy for an Mscs Shared Disk166 167 Virtual Disk Copy Restrictions Before you Begin Creating a Virtual Disk Copy168 Create Copy Wizard Virtual Disk Copy and Modification OperationsFailed Virtual Disk Copy 169 Failed RAID Controller Module Preferred RAID Controller Module OwnershipCopy Manager 170 171 Copying the Virtual Disk 172 Storage Array Performance During Virtual Disk Copy Stopping a Virtual Disk Copy Setting Copy PrioritySelect Change→ Copy Priority 173 Preparing Host Servers to Recopy a Virtual Disk Recopying a Virtual Disk174 175 Re-Copying a Virtual Disk Select Copy→ Re-Copy Removing Copy PairsSelect Copy→ Remove Copy Pairs 176 177 178 179 Configuration Device Mapper Multipath for Linux Prerequisite Steps Using DM Multipathing Devices180 Scan for Newly Added Virtual Disks Device Mapper Configuration Steps181 182 Add a New Partition to Device Mapper Create a New fdisk Partition on a Multipath Device Node183 Mount a Device Mapper Partition Create a File System on a Device Mapper PartitionReady for Use Blacklist Local Drive in Multi-path Driver 185 Important Information About Special Partitions 186 Device Mapper Commands Descriptions 187 Limitations and Known Issues 188 TroubleshootingQuestion Answer 189 Downloading RAID Controller and Nvsram Packages 190 Downloading Both RAID Controller and Nvsram Firmware 191 Click Transfer 192 Downloading Only Nvsram Firmware Upgrade RAID Controller Module Firmware window is displayed Select Tools→ Upgrade RAID Controller Module Firmware193 194 195 Downloading Physical Disk Firmware 196 Downloading MD1200 Series Expansion Module EMM Firmware AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownload Environmental EMM Firmware dialog is displayed 197 Self-Monitoring Analysis and Reporting Technology Smart Media Errors and Unreadable Sectors198 199 200 Recommended Tools Management Installing Array Components201 Front Bezel Optional Installing the Front BezelRemoving the Front Bezel 202 Hard Drives Safety Models AMT, E03J, and E04JRemoving a Hard-Drive Blank 203 Removing a Hard Drive Installing a Hard-Drive Blank204 205 Removing and Installing a Hard Drive 206 Installing a Hard Drive 207 Removing a Hard Drive From a Hard-Drive Carrier 208 RAID Controller Module Installing a Hard Drive Into a Hard-Drive CarrierRemoving a RAID Controller Module Blank 209 210 Installing a RAID Controller Module Blank 211 Removing a RAID Controller Module Opening the RAID Controller Module Installing a RAID Controller Module212 213 Closing the RAID Controller Module Removing the RAID Controller Module Backup Battery Unit RAID Controller Module Backup Battery Unit214 215 Installing the RAID Controller Module Backup Battery Unit Removing a Power Supply/Cooling Fan Module Power Supply/Cooling Fan Module216 217 Installing a Power Supply/Cooling Fan Module Removing the Control Panel Control Panel218 219 220 Installing the Control Panel Removing the Backplane Backplane221 222 17. Removing and Installing the Backplane-PowerVault MD3220 16. Removing and Installing the Backplane-PowerVault MD3200 224 Installing the Backplane Viewing the Firmware Inventory Management Firmware Inventory225 226 Virtual Disk Service Microsoft ServicesVolume Shadow-Copy Service Management System Interfaces 228 Start-Up Routine Troubleshooting Your Storage Array SoftwareDevice Health Conditions 229 230 On the Setup tab, select Manage a Storage ArrayStatus Icon Description Additional Status Icons Description 231 232 Storage Array Support Data Enter the Execution summary Automatically Collect the Support Bundle Data233 Event Log Collecting the Physical Disk Data234 235 Recovery Guru Select Storage Array→ View→ Profile Storage Array Profile236 237 Viewing the Physical Associations Viewing the Logical Associations238 239 Finding Nodes Select Find all free capacity nodes Using Go ToClick Find Next 240 241 Recovering From an Unresponsive Storage Array Condition 242 243 244 Locating a Physical Disk Select Physical Disk→ Blink→ Expansion Enclosure Locating an Expansion Enclosure245 246 Capturing the State Information 247 SMrepassist Utility Unidentified Devices Recovering From an Unidentified Storage Array248 249 250 251 Starting or Restarting the Host Context Agent Software 252 Troubleshooting Loss of Communication Troubleshooting Your ArrayTroubleshooting External Connections 253 254 Troubleshooting Power Supply/Cooling Fan Module Troubleshooting Expansion Enclosure Management Modules Troubleshooting Array Cooling Problems255 256 Troubleshooting RAID Controller Modules 257 258 Troubleshooting Hard Drives 259 Troubleshooting Array and Expansion Enclosure Connections 260 Troubleshooting a Wet Storage Array Conditions Troubleshooting a Damaged Array261 PCI Errors ECC ErrorsInvalid Storage Array Critical Conditions 263 Noncritical Conditions 264 Contacting Dell Getting HelpVisit support.dell.com Click All Support from Support menu 266 267 Index 268 269 270 271 272