Dell MD3620F, MD3600f Selecting the Secondary Virtual Disk, Setting the Write Mode, 187

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Selecting the Secondary Virtual Disk

CAUTION: Creating a replicated virtual disk pair starts a process between the primary and secondary virtual disks that overwrites all existing data on the secondary virtual disk and set the disk to read-only access. If you have existing data on your secondary virtual disk stop all I/O to the disk, back up the data, and unmount any file systems mounted to the secondary virtual disk before creating the replicated virtual disk pair.

1Select the remote storage array and the primary virtual disk.

2In the Select Secondary Virtual Disk (Create Remote Replication) wizard, select the secondary virtual disk.

NOTE: The secondary virtual disk must have a capacity equal to or greater than the capacity of the primary virtual disk.

3Click Next.

The Set Write Mode (Create Remote Replication) wizard is displayed. Go to "Setting the Write Mode" on page 187.

Setting the Write Mode

The secondary host ports on the storage arrays are reserved for data synchronization between the primary virtual disk and the secondary virtual disk in a replicated virtual disk pair. You can set remote replication to write either synchronously or asynchronously.

•In the synchronous mode, the RAID controller module on the primary virtual disk sends an I/O completion message back to the host storage array after the data has been successfully copied to the secondary storage array. The synchronous mode is the preferred mode of operation, since it offers the best chance of full data recovery from the secondary storage array in the event of a disaster. However, a synchronous replication mode can degrade the I/O performance of the host when long-distance data transfer is involved.

•In the asynchronous mode, the RAID controller module on the primary storage array sends an I/O completion message to the host storage array before the data is successfully copied to the secondary storage array. The asynchronous mode offers faster host I/O performance; however, it does not guarantee that data was successfully written to the secondary virtual disk or that the write requests were completed on the secondary virtual disk in the same order they were initiated. In asynchronous mode, you can

Configuration: Premium Feature— Remote Replication

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Contents Dell PowerVault MD3600f and MD3620f Storage Arrays Page Contents Planning MD3600f Series Storage Array Terms and Concepts Cache Functions and FeaturesVirtual Disk Operations Limit Configuring Alert Notifications Configuration AboutManaging Host Port Identifiers Enabling or Disabling the Event MonitorMoving a Host to a Different Host Group Starting or Stopping the Host Context AgentHost-to-Virtual Disk Mapping Configuring Hot Spare Physical Disks135 130133 134157 148153 Snapshot Repository Capacity 154169 167Failed RAID Controller Module 167 168Using Remote Replication Viewing the Properties Pane Viewing Logical Elements 221 Using DM Multipathing Devices 212211 219242 Power Supply/Cooling Fan Module 237235 239261 Media Errors and Unreadable Sectors 257Self-Monitoring Analysis and Reporting 256 Viewing the Firmware Inventory 259281 Recovering From an Unresponsive 276275 279292 Troubleshooting PowerTroubleshooting Expansion 294 Enclosure Management Modules Troubleshooting a Damaged Array 299About This Document IntroductionDell PowerVault Modular Disk Storage Manager Dell PowerVault MD3600f Series Storage ArrayOther Information You May Need Introduction Overview Planning About Your Storage ArrayFront-Panel Features and Indicators Hardware FeaturesPlanning About Your Storage Array Item Indicator, Button, or Icon Description Connector Back Panel Features and Indicators Hard Drive Indicators Hard-Drive Indicator PatternsDrive-Status Indicator Pattern Condition Power Supply and Cooling Fan FeaturesPower Indicator Codes Item LED Type Icon Description Power Indicator CodesRAID Controller Modules Planning RAID Controller ModulesFunction RAID Controller Module Connectors and FeaturesComponent Function Battery Backup Unit RAID Controller Module-Additional FeaturesHost Channel LED Link/Rate Indications Cache Mirroring Cache Functions and FeaturesSystem Password Reset Storage Array Thermal ShutdownWrite-Back Cache SFP Transceivers, Fiber Optic, and SAS CablesWrite-Through Cache Fiber Optic Cable Connection Interoperability of 2 Gbps, 4 Gbps, and 8 Gbps Devices Physical Disks, Virtual Disks, and Disk Groups Planning MD3600f Series Storage Array Terms and ConceptsPhysical Disk States Physical DisksVirtual Disks and Disk Groups Self-Monitoring Analysis and Reporting TechnologyRAID Controller Virtual Disk States Description Virtual Disk StatesRAID Level Usage RAID LevelsRAID Virtual Disk Operations Segment SizeVirtual Disk Initialization Media Verification Background InitializationForeground Initialization Consistency CheckVirtual Disk Operations Limit Cycle TimeRAID Level Migration Disk Group OperationsSegment Size Migration Disk Group Operations Limit Virtual Disk Capacity ExpansionDisk Group Expansion Disk Group DefragmentationRAID Background Operations Priority Disk Migration Virtual Disk Migration and Disk RoamingPlanning MD3600f Series Storage Array Terms and Concepts Disk Roaming Advanced FeaturesHost Server-to-Virtual Disk Mapping Snapshot Virtual Disks Host TypesVirtual Disk Copy Snapshot Repository Virtual DiskSource Virtual Disk Virtual Disk RecoveryTarget Virtual Disk Multi-Path Software Using Snapshot and Disk Copy TogetherPreferred and Alternate Controllers and Paths Virtual Disk Ownership Load BalancingMonitoring MD3600f Series System Performance Planning MD3600f Series Storage Array Terms and Concepts Performance Monitor Table Description Column Headings Planning MD3600f Series Storage Array Terms and Concepts User Interface Configuration OverviewEnterprise Management Window Array Management Window Inheriting the System SettingsConfiguration Overview Out-of-Band Management Out-of-Band and In-Band ManagementAdding 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 ArraysStop All Indications Name/Rename Storage Arrays dialog appears Naming or Renaming Storage ArraysType the New password Setting a PasswordViewing Storage Array Connections Password GuidelinesSelect Edit→ Remove→ Storage Array Adding/Editing a Comment to an Existing Storage ArrayRemoving Storage Arrays Select Edit→ CommentFailover Alert Display Enabling Premium FeaturesChanging Expansion Enclosure ID Number Changing the Cache Settings on the Storage ArrayChange→ Enclosure ID AMW, select Storage Array→ Change→ Enclosure Order Configuring Alert NotificationsSelect Configure Alerts Changing the Enclosure Order in the Physical PaneConfiguring 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 Select Action→ Properties Enabling or Disabling the Event MonitorWindows LinuxConfiguring Host Access Configuration About Your HostDefining a Host Using the Mappings TabSelect Mappings→ Define→ Host Managing Host Groups Removing Host AccessSelect Mappings→ Remove Removing a Host From a Host Group Creating a Host GroupSelect Mappings→ Define→ Host Group Adding a Host to a Host GroupMove Host Confirmation dialog appears Moving a Host to a Different Host GroupRemoving a Host Group Select Mappings→ MoveStarting or Stopping the Host Context Agent Host TopologyLinux Windows Data Path ProtectionClick Action→ Start Managing Host Port Identifiers Add Host Port Identifier dialog appears Configuration About Your Host Configuration About Your Host Creating Disk Groups and Virtual Disks Configuration Disk Groups and Virtual DisksIntroduction Create Disk Group window is displayed Creating Disk Groups100 101 Creating Virtual Disks Locating a Disk Group103 Changing the Virtual Disk Modification Priority Map later Using Mappings View104 105 Changing the Virtual Disk Cache Settings106 107 Changing the Segment Size of a Virtual DiskModification Priority Changing the I/O TypeSelect Virtual Disk→ Change→ Segment Size 108File system typical Database Multimedia Custom Choosing an Appropriate Physical Disk Type109 110 Physical Disk Security With Self Encrypting Disk111 112 Creating a Security Key113 Click Create Key114 Changing a Security KeyClick Change Key Saving a Security Key115 116 Erasing Secure Physical Disks Unlocking Secure Physical Disks117 Select Physical disk→ Hot Spare Coverage Configuring Hot Spare Physical Disks118 Click Unassign Hot Spare Physical Disk Options window is displayed119 120 Hot Spares and RebuildGlobal Hot Spares Hot Spare OperationHot Spare Drive Protection Enclosure Loss Protection121 Criteria for Enclosure Loss Protection RAID Level 122123 Creating Host-to-Virtual Disk Mappings Host-to-Virtual Disk Mapping124 125 Mapping Modifying and Removing Host-to-Virtual Disk Mapping126 Select Virtual Disk→ Change→ Ownership/Preferred Path Changing Controller Ownership of the Virtual Disk127 128 Removing Host-to-Virtual Disk Mapping129 Changing the RAID Level of a Disk GroupSelect Disk Group→ Change→ Ownership/Preferred Path Select Disk Group→ Change→ RAID Level130 Restricted MappingsMapping Restrictions Operating System Highest LUN 131 132 Select Disk Group→ Ownership/Preferred Path. or133 Changing the RAID Level of a Disk Group134 Storage PartitioningSelect Disk Group→ Add Free Capacity Physical Disks Disk Group and Virtual Disk Expansion135 Virtual Disk Expansion Using Free Capacity136 Non-Exportable Components Using Unconfigured CapacityDisk Group Migration Export Disk Group138 Import Disk GroupExporting a Disk Group Importing a Disk GroupNon-Importable Components Storage Array Media Scan139 140 Changing Media Scan Settings141 Suspending the Media Scan142 143 Configuration Premium Feature- Snapshot Virtual Disks144 Creating a Snapshot Virtual Disk Using the Simple Path145 About the Simple Path146 147 Select Virtual Disk→ Snapshot→ Create. orAbout the Advanced Path Creating a Snapshot Virtual Disk Using the Advanced Path148 149 150 151 Creating the Snapshot Using the Advanced Path152 Specify Virtual Disk Parameters window is displayed153 Specifying Snapshot Virtual Disk Names154 Snapshot Repository Capacity155 Add Physical Disks window closes Click Add Physical Disks156 Select Virtual Disk→ Snapshot→ Re-create Re-creating Snapshot Virtual Disks157 158 Disabling a Snapshot Virtual Disk159 Preparing Host Servers to Re-create a Snapshot Virtual Disk160 Re-creating a Snapshot Virtual Disk161 Configuration Premium Feature- Virtual Disk Copy162 Creating a Virtual Disk Copy for an Mscs Shared Disk163 Virtual Disk Read/Write Permissions164 Virtual Disk Copy RestrictionsBefore You Begin Creating a Virtual Disk Copy165 166 Virtual Disk Copy and Modification OperationsCreate Copy Wizard Failed Virtual Disk Copy167 Preferred RAID Controller Module OwnershipFailed RAID Controller Module Copy Manager168 Copying the Virtual DiskStorage Array Performance During Virtual Disk Copy Setting Copy Priority169 170 Stopping a Virtual Disk CopyRecopying a Virtual Disk Select Change→ Copy Priority171 Preparing Host Servers to Recopy a Virtual DiskSelect Copy→ Re-Copy Recopying the Virtual Disk172 173 Removing Copy Pairs174 175 176 177 Configuration Premium Feature- Remote ReplicationReplication Repository Virtual Disks Activating Remote Replication178 Primary and Secondary Virtual Disk Pairs RAID Levels for Replication Repository Virtual Disks179 Storage Partitioning With Remote Replication Using Remote Replication With Other Features180 181 Snapshot Virtual Disk With Remote ReplicationVirtual Disk Copy With Remote Replication Virtual Disk Expansion With Remote Replication182 Required Switch Zoning ConfigurationsSwitch Cascading Zoning Guidelines for Remote Replication183 Setting Up and Managing Remote ReplicationJournaling File Systems and Remote Replication Prerequisites184 Completed Activate Remote Replication message is displayed Preview Activate Remote Replication wizard is displayed185 186 Creating a Remote ReplicationSelecting the Secondary Virtual Disk Setting the Write Mode187 188 Setting Synchronization Priority and Synchronization Method189 Completing the Remote Replication190 RAID Controller Module Ownership/Preferred Path191 Viewing the Storage Array Profile192 Viewing the Properties PaneViewing Logical Elements of the Secondary Virtual Disk Select View Associated Logical Elements193 194 Changing Write Mode and Consistency Group MembershipWrite Mode and Consistency Group Membership IconStatus Virtual Disk Status Icons195 Select Change→ Write ModeNormally Synchronized Virtual Disks Resynchronizing Virtual Disks196 197 Changing Synchronization Priority and Method198 199 Unsynchronized Virtual DisksManually Resynchronizing Virtual Disks Automatically Resynchronizing Virtual Disks200 201 202 Suspending a Remote ReplicationAbout Resumed Remote Replications Resuming a Remote Replication203 204 Select Test Replication Communication205 Deleting a Primary Virtual Disk206 Deleting a Secondary Virtual Disk207 Removing a Remote Replication From a Storage Array208 Deactivating the Remote Replication on the Storage Array209 Disabling the Remote Replication Premium Feature210 211 Configuration Device Mapper Multipath for LinuxPrerequisites Using DM Multipathing Devices212 Scan for Newly Added Virtual Disks Device Mapper Configuration Steps213 214 Add a New Partition to Device Mapper Create a New fdisk Partition on a Multipath Device Node215 216 Create a File System on a Device Mapper PartitionMount a Device Mapper Partition Ready for UseImportant Information About Special Partitions Device Mapper Commands Descriptions217 218 Limitations and Known Issues219 TroubleshootingQuestionAnswer 220 221 Recommended Tools222 Installing the Front BezelFront Bezel Optional Removing the Front Bezel223 Safety Models AMT, E03J, and E04JHard Drives Removing a Drive BlankRemoving a Hard Drive Installing a Drive Blank224 225 Removing and Installing a Hard Drive226 Installing a Hard Drive227 Removing a Hard Drive From a Hard-Drive Carrier228 229 Installing a Hard Drive Into a Drive CarrierRAID Controller Module Removing a RAID Controller Module Blank230 Installing a RAID Controller Module Blank231 Removing a RAID Controller Module232 Installing a RAID Controller Module233 Opening the RAID Controller Module234 Closing the RAID Controller ModuleRemoving the RAID Controller Module Backup Battery Unit RAID Controller Module Backup Battery Unit235 236 Installing the RAID Controller Module Backup Battery UnitRemoving a Power Supply/Cooling Fan Module Power Supply/Cooling Fan Module237 238 Installing a Power Supply/Cooling Fan ModuleRemoving the Control Panel Control Panel239 240 241 Installing the Control PanelRemoving the Backplane Backplane242 243 17. Removing and Installing the Backplane-PowerVault MD3620f 16. Removing and Installing the Backplane-PowerVault MD3600f245 Installing the Backplane246 247 Downloading RAID Controller and Nvsram Packages248 Downloading Both RAID Controller and Nvsram FirmwareClick Transfer Select Tools→ Upgrade RAID Controller Module Firmware249 250 Downloading Only Nvsram Firmware251 252 Click Nvsram in the Download area253 Downloading Physical Disk Firmware254 Download Physical Disk Introduction window appears255 AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownloading MD1200 Series Expansion Module EMM Firmware Download Environmental EMM Firmware dialog appears256 Self-Monitoring Analysis and Reporting Technology Smart257 Media Errors and Unreadable Sectors258 259 Viewing the Firmware Inventory260 261 Microsoft ServicesVirtual Disk Service Volume Shadow-Copy Service262 Start-Up Routine Indications Look/listen for Action Start-Up RoutineDevice Health Conditions 263264 On the Setup tab, select Manage a Storage ArrayStatus Icon Description Additional Status Icons Description 265266 Storage Array Support DataEnter the Execution summary Automatically Collect the Support Bundle Data267 268 Collecting the Physical Disk Data269 Event LogStorage Array Profile Recovery Guru270 271 Select View→ Associated Logical Elements. or Viewing the Logical Associations272 Finding Nodes Viewing the Physical Associations273 274 Select Find all free capacity nodesSelect View→ Go To→ Snapshot Repository Virtual Disk Using Go ToClick Find Next Select View→ Go To→ Snapshot Virtual Disk276 Recovering From an Unresponsive Storage Array ConditionSelect View→ Go To→ Source Virtual Disk Select View→ Go To→ Target Virtual Disk277 278 Locating an Expansion Enclosure Locating a Physical Disk279 Select Physical Disk→ Blink→ Expansion Enclosure Capturing the State Information280 281 SMrepassist UtilityUnidentified Devices Recovering From an Unidentified Storage Array282 283 284 285 Starting or Restarting the Host Context Agent Software286 287 288 Troubleshooting an SFP Transceiver Troubleshooting Loss of Communication289 290 Removing an SFP Module 291Troubleshooting Power Supply/Cooling Fan Module Troubleshooting External Connections292 293 Troubleshooting Array Cooling Problems294 Troubleshooting Expansion Enclosure Management Modules295 Troubleshooting RAID Controller Modules296 Troubleshooting Hard Drives297 Troubleshooting Array and Expansion Enclosure Connections298 Troubleshooting a Wet Storage Array299 Troubleshooting a Damaged Array300 ECC ErrorsConditions Invalid Storage Array301 PCI ErrorsCritical Conditions Noncritical Conditions302 Visit support.dell.com Contacting Dell303 304 305 Index306 307 308 309 310 311 312
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MD3620F, MD3600f specifications

Dell's MD3620F and MD3600F storage arrays are designed for businesses seeking dependable, high-performance storage solutions tailored to meet the demands of modern data management. These models offer a blend of scalability, efficiency, and advanced features, making them well-suited for a range of applications, from virtual environments to critical database operations.

One of the primary features of the MD3620F and MD3600F is their support for a hybrid storage architecture. This approach allows organizations to combine flash storage with traditional hard disk drives (HDDs) to optimize performance and cost. The MD3620F focuses heavily on all-flash configurations, delivering exceptional speed and lower latency, ideal for I/O-intensive workloads.

Scalability is another hallmark of these storage solutions. The MD3600F allows users to scale up to 120 drives, providing robust capacity to meet growing data needs. The MD3620F is engineered for environments where data availability and speed are paramount, with support for high IOPS (Input/Output Operations Per Second) and consistent performance under stress.

In terms of data management, both systems integrate with Dell’s proprietary software, which enhances operational efficiency through features like automated tiering. This technology optimizes data placement between different storage types based on access frequency, ensuring that hot data is readily available while reducing costs associated with less critical data.

Reliability is crucial for businesses that depend on their storage systems. The MD3620F and MD3600F come equipped with advanced data protection mechanisms, such as RAID support, which safeguards against data loss, and snapshot capabilities that provide point-in-time copies of data. Moreover, these solutions include hot-swappable components, ensuring minimal downtime for maintenance and repairs.

Connectivity is also a strong suit of these storage arrays. They support multiple connectivity options, including SAS and iSCSI, allowing for flexible integration into existing IT infrastructures. This adaptability enhances their appeal to a wide range of enterprise environments.

In summary, the Dell MD3620F and MD3600F stand out as robust storage solutions with a combination of hybrid and all-flash configurations, scalability, advanced data management tools, and enhanced reliability features. These characteristics make them ideal for organizations looking to enhance their data storage capabilities while maintaining high performance and efficiency.
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