Dell™ PowerVault DL Backup to Disk Appliance

Table of Contents

Overview

Deployment

Disk Configuration Policy

Software Options

Access PowerVault DL Backup to Disk Appliance Console

Access CommCell Console

Access the CommCell Console Remotely

Display the EZ Operation Wizard

VMware Virtualization

Getting Started with Virtualization

Automatic Disk Group Configuration

For the DL2300 Appliance

Install Clients

Backup

Scheduled Backup

Custom Backup

Restore

Configure Backup Targets

Configure Magnetic Libraries

Configure Tape Libraries

Deduplication

Getting Started with Deduplication

Data Retention

Disk Management

Migrate Libraries

Alerts

Alert Types

Custom Alerts

Software Updates

Where to go From Here

Data Encryption

Data Verification

Disaster Recovery

Re-install the Backup Software

Restore the Backup Data

Upgrade

Upgrade Requirements

Upgrade Procedure

Troubleshooting

Overview

Thank you for choosing the Dell PowerVault DL Backup to Disk appliance to manage your enterprise and departmental data.

The Dell™ Backup to Disk appliance is an easy to use, comprehensive storage solution containing storage capacity integrated with the software necessary to backup system data. The software solution simplifies storage management by using policies to backup and restore data.

Once the appliance is powered on, the software solution uses the PowerVault DL Backup to Disk Appliance Configuration Wizard to automatically configure the system. The backup software then configures the external storage device(s) and prepares the system for managing backups.

For information on setting up the appliance, see the Dell PowerVault DL Backup to Disk Appliance Setup Diagram that shipped with the system.

For complete information on the appliance, refer to Dell PowerVault DL Backup to Disk Appliance Powered by CommVault Simpana User's Guide available at http://support.us.dell.com/manuals.

The following sections describe the essential steps to configure and use the data backup and recovery solution software on the Dell PowerVault DL Backup to Disk appliance.

Deployment

Once the system is racked, cabled and powered on, provide the factory default login credentials to log into Windows. The PowerVault DL Backup to Disk Appliance Configuration Wizard starts automatically. The Backup to Disk Appliance Configuration Wizard guides you through a sequence of steps, which include configuring the hardware and software. For comprehensive information on configuring the appliance, refer to the Dell PowerVault Backup To Disk Appliance Powered By CommVault Simpana User's Guide available at http://support.us.dell.com/manuals.

The PowerVault DL Backup to Disk Appliance Configuration Wizard allows the following:

The wizard then proceeds to configure the following software specific configuration as described in the following section:

Disk Configuration Policy

The wizard provides the following options for storage array disk group configuration policy:

 

Automatic Configuration

Manual Configuration

1. The process of initializing the backup operation is automatically performed. Once the disk configuration is successfully completed, use the backup configuration wizard to make the appliance ready for backup. In manual disk configuration, the disk storage array configuration must be performed manually.
2. The following tasks are automatically performed during the appliance configuration:
  • Virtual Disk Creation
  • Volume Creation
  • Formatting of the volumes
  • Assignment of Mount Points
  • Configuration of the disk libraries for backup.

Magnetic libraries visible to the operating system are automatically configured. Optionally, tape libraries can also configured manually. See Configure Tape Libraries for instructions.

The following tasks are performed when configuring a backup target:

  • Creation of storage policies for backup.
  • Creation of backup schedules.
The following disk configuration tasks must be manually performed:
  • Virtual Disk Creation
  • Volume Creation
  • Formatting of the volumes
  • Assignment of Mount Points
  • Configuration of the disk libraries (See Configure backup Target for details)

For instructions on how to partition the disk, create volumes, and assign mount points, refer to the Dell PowerVault DL Backup to Disk Appliance Powered by CommVault Quick Reference Guide available at http://support.us.dell.com/manuals.

The following tasks are performed to configure a backup target:

  • Creation of storage policies for backup.
  • Creation of backup schedules.
3. Might require additional configuration if there are new disks to be configured for use, in the library. See Automatic Disk Group configuration for details.  
4. Once the configuration is successfully completed you can proceed to install the client software agents. See Installing Clients for details.

Software Options

The PowerVault DL Backup to Disk Appliance Configuration Wizard provides the following options to install the software:

CommServe™ and MediaAgent

Use this option if you want to configure a standalone Backup to Disk appliance that will serve as the CommCell and manage other MediaAgents purchased from Dell. Note that a DL Backup To Disk Appliance CommCell can not be used to manage non-Dell MediaAgents.
By default, Dell PowerVault setup has two instances configured on the computer. After CommServe and MediaAgent install, the first instance gets activated automatically and the second instance will remain inactive and cannot be activated.

CommServe™, MediaAgent, and Virtualization

If you are using VMware virtualization in your environment, you can configure protection of your virtual machines by providing the Virtual Center and ESX Server details in this wizard. The Virtual Server iDataAgent is installed automatically and configured to perform a first backup of all your virtual machine data.

MediaAgent Only

Use this option if you want to configure the Backup to Disk appliance to connect to an existing Dell CommServe environment.
By default, Dell PowerVault setup has two instances configured on the computer. After MediaAgent install, the second instance gets activated and the first instance remain inactive.

Access PowerVault DL Backup to Disk Appliance Console

The PowerVault DL Backup to Disk Appliance Console (AMC) will automatically launch (in 1 to 3 minutes) after completing the DL appliance configuration.  To manage backup storage data, click the link Launch CommVault Software from the Home tab.

The CommCell Console can also be accessed individually. See Access the CommCell Console for instructions.

Access the CommCell Console

The CommCell Console is the graphical user interface that helps you to run backups and restores. In addition the CommCell Console also provides a number of other features to help you control and manage the backup data. The following section describes how to open the CommCell Console.

1. Launch the CommCell Console from the Start | Programs menu, or by clicking the CommCell Console icon on your desktop.
2.
  • Enter the User Name, Password, and name of the CommCell that you want to connect to.

    The default User Name is 'cvadmin', and the default Password is 'cvadmin'.

  • Click OK.
We recommend that you change the password after your first logon to the CommCell. See Change a User Password for instructions to change the password.
3. If you have not activated the license yet, you will receive a reminder prompt. See Activate Licenses for instructions on activating the permanent license.
4. From the CommCell Browser, click the EZ Operation icon in the toolbar to display EZ Operation Wizard.

You can use the EZ Operations Wizard to:

  • Configure libraries (backup targets)
  • Backup or restore your data
  • Select the Expert View, Event Viewer, or Job Controller in the CommCell Console
  • Access the online tutorial that provides an introduction to the backup software and explains the various features and functionalities. Click the Online Tutorial to access the tutorials.

Access the CommCell Console Remotely

CommCell Console can also be accessed as a remote web-based application from any computer capable of communicating with the CommServe computer, using the web alias name. For example, if you want to access the CommServe computer blue remotely, type the following in the web browser:

http://blue/<commcell_console_web_alias_name>

If you have installed the software in the current version, use the web alias Console. If you have upgraded the software from a release prior to Simpana 8, use the web alias Galaxy.

See Web Administration for more information.

Display the EZ Operation Wizard

The CommCell Console displays the EZ Operations Wizard by default. However, the EZ Operation Wizard can be accessed anytime for configuration purposes.

To manually access the EZ Operation Wizard:

  1. From the CommCell Console, click Tools, and select Control Panel.
  2. In the Control Panel, double-click EZ Operations.

VMware Virtualization

If you enabled the VMware virtualization options in the PowerVault DL Backup to Disk Appliance Configuration Wizard, the Virtual Server iDataAgent is automatically installed and configured to run your first backup of VMware virtual machines, volumes, files, and folders. The CommCell Console's pre-configured entities are described in the following table:

CommCell Console Entity Description
Agent Defines VMware as the virtualization
Instance Defines the Virtual Center or ESX Servers to be backed up
Backup Set Defines how virtual machines will be discovered and added to backups
Subclient Defines the virtual machines that will be backed up
Storage Policy Defines the channels between the backup data's original location and the storage media
Schedule Policy Defines the schedules with which backups will run

The image on the right details each of these entities as they appear in the CommCell Console.

 

 

Getting Started with Virtualization

The Getting Started - VMware Backup documentation provides all the steps necessary to immediate run your first backup and restore.

Automatic Disk Group Configuration

Automatic Disk Group Configuration tool manages disk group configuration for the appliance when the appliance is operating in the automatic disk configuration mode. During the initial disk configuration, virtual disks (LUNS) are created from the available disks within the optional external storage enclosures. The virtual disks are created from a group of physical disks consisting of a set of seven disks, slots 1 through 7 or 8 through 14. Each virtual disk is created with a default size of 1.5 TB. If the required amount of space is not available in the disk group, then it uses the available disk space. If more than one external storage enclosure is available, then it configures all the available disk groups and creates virtual disks on all the disks. The virtual disks are created with RAID-5.

The disks in slot 0 (if any) are assigned as a global hot spare. All virtual disks are formatted with NTFS volume and use a file allocation unit size of 64 KB. The volumes are mounted under C:\DiskStorage directory as Mount Points. The software then automatically configures one disk library containing all of the external virtual disks. A default storage policy is created using this disk library for backup operations.

For the DL2300 Appliance

  The automatic disk group configuration configures disk library, creates a deduplication storage policy using this disk library for backup operations and non-deduplication storage policy for DDB backup. Once deduplication storage policy is created, DDB Backup subclient is automatically created under the MediaAgent client computer and is automatically configured to use the non-deduplication storage policy.

This deduplication database backup job is automatically scheduled for every 8 hours.

To access the Automatic Disk Group Configuration tool, go to Start > Programs > CommVault Systems > Automatic Disk Group Configuration.

After the initial disk configuration, the Automatic Disk Group Configuration tool will be displayed whenever there are new disks to be configured for use in the library. The Automatic Disk Group Configuration tool may display in the following scenarios:

The Automatic Disk Group Configuration tool provides the following options:
  1. Continue with automatic disk group configuration

    Select this option to configure the disks and continue with the automatic configuration.

  2. Change physical disks and retry

    Select this option to address one of the following warnings and continue with the automatic configuration:

    • The unconfigured physical disks are not all the same size. Storage capacity will be lost in disk group configuration.
    • The Slot 0 is empty and hence no Global Hot Spare will be assigned.
    • The Slot 0 disk size is smaller than other disks in the slot. Replace equal or higher capacity disk to be able to assign it as a Global Hot Spare.
    • The newly insert disk is a SAS disk, the automatic disk group configuration doesn't support SAS disk.
    • Non standard LUN is present in the disk array. LUN is either less than seven drives, or crossing slot disk group boundary of 1-7, 8-15.
    • LUN is formatted as dynamic disk.
    • Non Raid-5 LUN is present in disk array.
  3. Cancel disk group configuration

    Select this option to cancel disk configuration. You can use the Automatic Disk Group Configuration tool at a later time to complete the configuration.

Install Clients

Client agents are software modules that perform data protection and data recovery operations for specific operating systems or applications. Multiple agents may be used to protect all types of data residing on a computer. For more information on client agents and overview of the interaction between the various CommCell components, see CommCell Overview.

For more information on installing the client modules and step-by-step installation procedures, see Installation.

When you install agents in an IPv6-capable network, the agents must also be IPv6-capable. For remote installations, this setting must be enabled manually. To do so, create the nOverridePreferredIPFamily registry key on the agent computer and set the value to '0', prior to installing the software. See Internet Protocol - Important Considerations for additional IPv6 considerations.

Backup

Once the client agents are installed, backup operations are automatically scheduled. In addition to the scheduled backup other custom backup operations can also be performed.

Scheduled Backup

The following backup schedules are created automatically.

Custom Backup

Custom backups operations can be performed using the EZ Operations Wizard.

To backup data using EZ operations wizard:

  1. From the EZ Operations Wizard, click the Backup button.
  2. The EZ Operations Wizard guides you through the process of configuring schedules, backup options, and alerts.
  3. After entering the appropriate information, review your selections on the Summary dialog, then either click Finish to save the changes or Back to return to the previous dialog to change any of the selections.
  4. When the backup begins, you can track the progress of the job in the Job Controller.
  5. When the status for the job in the Job Controller changes to Completed, the backup has finished.

For a comprehensive overview of backup operations and more backup options, see Back Up Data.

Restore

Data restore operations are performed when the production data is not available for use and the data needs to be restored from the backup storage. Backup data can be restored using the EZ Operations Wizard.

To restore data using EZ operations wizard:

  1. From the EZ Operations Wizard, click the Restore button.
  2. The EZ Operations Wizard guides you through the process of choosing browse options, file overwrite options, and restore destinations.
  3. After entering the appropriate information, review your selections on the Summary dialog, then either click Finish to save the changes or Back to return to the previous dialog to change any of the selections.

See Restore Backup Data for comprehensive overview of data restore and more restore options.

Configure Backup Targets

Backup targets can be either magnetic libraries or tape libraries. The following sections explain the library configuration procedures.

Configure Magnetic Libraries

Magnetic Libraries can be configured from the CommCell Console using Library and Drive Configuration window in the Control Panel. See Configure Devices for more information and detailed instructions.

Internal Disk Support

Internal physical data disks (other than the Operating System disks) configured and shipped with the appliance are identified and used by the software. If your appliance is configured with internal data disks, the software uses the internal data disks for the following purposes.

The virtual disk consisting of the internal disks will be configured as a Magnetic Disk Library separate from the external storage enclosure Magnetic Disk Library. Note that the internal disks are not monitored for the standard/advanced state changes for the appliance.

Configure Tape Libraries

Tape libraries must be manually configured. Use the following procedure to configure tape libraries.

To configure sighted tape libraries:

1. Click the Backup Target button on EZ Operations Wizard.
  If the EZ Operations Wizard is not displayed double-click the icon in the toolbar.
2. Select Tape or Optical Devices.

Click Next.

3. Click and select the library that you want to configure.

Click Next.

4. Enter the number of days that you want to preserve the backup data.

Click Next.

5. Review the summary information and click Finish.

You can click Back to return to the previous dialog to change any of the selections.

6. Click OK.

Deduplication

Data Deduplication identifies and eliminates redundant information from the backup data, which provides significant reduction in the storage space required for data protection operations. When data is backed up for the first time, all the data is stored physically. If the same data is subsequently identified in another backup operation, then it is stored as a pointer to the previously stored copy.

Getting Started with Deduplication

The Getting Started - Deduplication to Disk documentation provides all the steps necessary to set up and use deduplication.

The deduplication store is a database that manages the deduplication process and is automatically created for all deduplication-enabled storage policy copies.

  • Whenever internal disks are available, the deduplication database is directed to the internal disks by default. You can change this default path and locate the deduplication database on any other internal or external disk of your choice.
  • Ensure to locate the deduplication store in a sub-directory within the default path. For example, if the default path displayed is C:\DiskStorage\Disk_1, then the deduplication store must be located on C:\DiskStorage\Disk_1\Store_1.

Data Retention

Backup data that is stored in the backup targets can be managed by defining rules to retain the data in the backup media. The following data retention parameters are set by default:

Use the EZ Wizard to modify the retention parameters.

Note that the EZ Wizard displays the initially configured library. If you have more than one tape libraries or magnetic libraries attached to a MediaAgent, use the CommCell Console to configure backup retention parameters for the additional libraries.

Disk Management

The following sections cover the procedures involved in managing PowerVault DL Backup to Disk Appliance on a day-to-day basis.

Migrate Libraries

Magnetic Libraries may be moved from one MediaAgent to another MediaAgent within the same CommCell. All disk groups within a Magnetic Library must be moved together. Moving individual disk groups is not supported.

To migrate the appliance internal disk group Magnetic Library, shut down the appliance and move the internal backup data disks to the identical internal drive slots in the new MediaAgent.

To migrate the external storage enclosure Magnetic Library, shut down the appliance. Then recable all of the external storage enclosures attached to the appliance to the new MediaAgent. Alternatively, remove the physical disks of every external storage enclosure and insert in a storage enclosure on the new MediaAgent ensuring to place the physical drives in the same slot numbers.

If the libraries on the CommServe host are migrated, make sure to configure the new disaster recovery backup destination after the migration is complete. See Change the Disaster Recovery Backup Destination for more details.

If you want to move disk libraries in the appliance from one MediaAgent to another MediaAgent, consider the following two options.

Cold Migration of Magnetic Libraries

In cold migration of Magnetic Libraries, the appliance is not functional when the internal disks or external storage enclosures are migrated. Move the disk libraries as required. When the appliance is powered back, the migrated libraries are recognized in their new location.

Hot Migration of Magnetic Libraries

In a hot migration of Magnetic Libraries, the appliance remains functional during the migration. When the appliance is accessed after the migration is complete, the migrated libraries are recognized in their new location.

Follow the steps given below to perform a hot swap.

  1. Gracefully shut down the source MediaAgent before moving the Magnetic Libraries.
  2. Move the Magnetic Libraries (as described above) to the destination MediaAgent.
  3. Using OpenManage Server Administrator (OMSA), import foreign configuration for virtual disks associated with the Magnetic Libraries.
  4. The destination MediaAgent displays the migrated disk libraries. The storage policies are updated with the new data paths.

Alerts

Alerts inform you of conditions occurring within a CommCell. These conditions can range from minor occurrences that do not require intervention to severe occurrences that require immediate intervention.

Alert Types

The following alerts are automatically created to monitor and report any issues with data protection operations and associated tasks.

Alert Type Criteria Description
Data Protection Job Failed A data protection operation failed, failed to start, or was aborted by the system.
Library Management Insufficient Storage The number of spare media inside the library for a scratch pool and cleaning pool fell below the low water mark defined or there is no spare media inside the library. The default threshold is 20 scratch pools.

For a magnetic library, the free disk space fell below the low water mark or there is insufficient disk space. The default threshold is 15% of the total disk capacity.

Maintenance Required The library or drive has exceeded its threshold, a drive requires cleaning.
Data Recovery Alert Job Failed A data protection operation failed - failed to start, or was aborted by the system.
Disaster Recovery Backup Job Failed A disaster recovery backup failed, failed to start, the operation was aborted by the system, or no storage policy was defined for the operation.
Data Verification Job Failed A data verification operation failed, failed to start, or the operation was aborted by the system.
Auxiliary Copy Job Failed An auxiliary copy operation failed, failed to start, or the operation was aborted by the system.

Custom Alerts

In addition to the alerts listed above, custom alerts can also be created. For more information on alerts and instructions to create additional alerts, see Alerts and Monitoring.

Software Updates

Automatic Updates are scheduled to download and install any post-release updates or Service Packs that may have been released after the release of the software. The latest software updates are downloaded once every week; the software updates are installed on Sundays.

To create custom schedules, or obtain more information on automatic software updates, see Automatic Updates.

Where to go From Here

Once the Dell PowerVault DL Backup to Disk is set up and configured to protect data, you can use the CommCell Console to administer your backups with the following features:

Data Encryption

Data encryption allows encrypting data both for transmission over non-secure networks and for storage on media providing security for data stored in the data protection operations. See Data Encryption for more details.

Data Verification

Data verification checks the validity of the data backed up in the data protection operation providing integrity to the data stored and restored. See Data Verification for more details.

In addition to the few features mentioned above, the backup software provides a wide range of functionalities. For the complete list of features offered in the software, see Index.

Disaster Recovery

The Dell PowerVault DL Backup to Disk System Recovery Guide describes the necessary steps to recover the system, based on the failure scenario. The document is available at http://support.us.dell.com/manuals.

Reinstall the Backup Software

If the backup and recovery software is corrupted, download and execute the Dell PowerVault DL Backup to Disk Appliance Recovery and Update Utility. This utility can be downloaded from http://support.dell.com.

  1. Run the executable file to begin the installation.
  2. Select the option to Reinstall Backup Application.
  3. When prompted to reinstall the software, insert the installation disc that contains the backup and recovery media shipped along with the appliance. Use the disc with volume label DVD 1 and title Windows and Netware.
  4. The software installation is performed.

Restore the Backup Data

Disaster recovery backup contains critical system information and backup data to reconstruct the backup mechanism in case of a system failure. This disaster recovery backup is automatically created and scheduled when the appliance is configured. See Scheduled Backup for details.

The disaster recovery backup is recovered using Disaster Recovery Tool that is installed in the appliance as part of software. For detailed discussions and using the disaster recovery tool, see CommServe Disaster Recovery Tool.

1. Once the software installation is complete, it recovers and remounts all the volumes in the disk array under C:\Diskstorage_Recovered directory. The DL Backup to Disk Appliance Console launches automatically.  
2. From the DL Backup to Disk Appliance Console Home tab, click Launch CommServe Disaster Recovery.  
3. In the CommServeDisasterRecoveryGUI, on the SQL Restore tab, select Restore DB check box.

Select Restore Single Database option.

Provide the DR dump location for the database restore in the Restore file field.

By default the CommServe disaster recovery dump location is the first healthy mount path in the disk array. For example, the disaster recovery backup location could be C:\Diskstorage\1\1\SET_XY. On recovery, this location will be available under  C:\Diskstorage_Recovered\1\1\SET_XY for the CommServe database disaster recovery operation.

4. Perform the following in Post Recovery tab to complete the disaster recovery procedure.
  • Select the Perform Post Recovery operations check box.
  • Select the following check boxes.
    • Reset index cache timestamps
    • Disable scheduler
    • Seal Dedup Stores
    • Disable All Activity
    • Suspend Running Jobs
  • Click OK to start the restore operation.
5. Once the restore operation is complete, manually start the services.

The volumes on disk array configured using automatic disk configuration is available under the original location of C:\DiskStorage. All volumes from the C:\DiskStorage_Recovered directory are unmounted and no longer visible at that location.

 
6. In a deduplication configuration, manually seal All the active deduplication stores. This step is required for proper pruning of the backup data. From the CommCell Console, right-click the deduplication-enabled Storage Policy Copy, click All Tasks, and then click Seal Deduplication Store. The deduplication store is sealed.  
7. Apply the latest service packs, updates, and patches to the backup software.  
8. From the CommCell console, right-click the CommServe computer and select Properties. From Activity Control tab, select Enable Scheduler to enable all the job schedules.
9. Right-click the CommServe computer, click All Tasks, and click Schedules. In the Scheduled Jobs window, perform the following.
  • In the Filters list, select Show All Schedules.
  • Enable all the schedules. To enable a schedule, select a schedule and click Enable.
  • Click Close.
10. The disaster recovery operation is now complete and the backup data can be restored from the disk subsystem.  

Upgrade

This section explains the process of upgrading the software solution on Dell PowerVault DL Backup to Disk appliance to the latest version. See Introduction for a general overview on software upgrade.

Upgrade Requirements

Review the following requirements before upgrading the software:

  1. The C:\Install\Commvault\Galaxy folder created during the installation must be available during upgrade. If this folder is not available, then create the folder before the upgrade.
  2. When upgrading the CommServe module, you will need to provide the SQL Server System Administrator password.

    If you have changed the password after the installation, then use your current SQL Server System Administrator password.

Upgrade Procedure

Use the following steps to upgrade the software:

  1. Insert the disc provided by the appliance manufacturer for upgrading the software into a drive on the local computer to which the appliance is connected.
  2. Run the setup.exe to start the upgrade program. For detailed step-by-step instructions to perform the upgrade, refer to the following procedures as applicable:
  3. The backup and recovery software is upgraded.

Troubleshooting

Consider the following scenarios and their workarounds:

  1. If the computer installed with the CommServe software is moved out of the domain, the firewall configurations will be reset. To manually restore the firewall configuration, execute the AddFWExclusions.bat from the <software_installation_path>\Base folder. Typically the software is installed at C:\Program Files\Commvault\Galaxy.
  2. If you notice any connectivity issues on backup jobs or auxiliary copy jobs in a Windows firewall enabled configuration, then execute the AddFWExclusions.bat from the <software_installation_path>\Base folder. This will resolve any firewall related connectivity issues.
  3. If the disk configuration could not complete the creation of mount path for a LUN, then the LUN must be manually deleted from the configuration. This enables the magnetic libraries to use the space for mount paths. To reuse the space for storage:
  4. Large backup jobs might result in a write error on windows 2008 Server Media Agents. The backup jobs might go into Pending state with the error message ‘Internal Software Error Occurred’. See View the Details of a Job to review the job pending reason.

    According to Microsoft, this error is generated when applications update very large files in Windows Server 2008 or in Windows Vista systems. To resolve this issue, install the Windows Hotfix provided in Microsoft Knowledge Base article 957065 at http://support.microsoft.com.

  5. When backup jobs containing multiple data streams are simultaneously executed resulting in concurrent I/O operations, the backup operation might hang and fail to respond.

    According to Microsoft, a Windows Vista-based or Windows Server 2008-based computer may stop responding during a storage stress test or under similar conditions. To resolve this issue, install the Windows Hotfix provided in the Microsoft Knowledge Base article 958960 at http://support.microsoft.com.

  6. Partial installation of CommCell Components might prevent AMC from getting launched. To avoid this issue, ensure that all components are successfully installed.
  7. If you have a non-Dell PowerVault CommServe and if you have MediaAgent installed on Dell PowerVault DL 2x00, you need to modify the value of nPreferredIPFamily registry key to 1 in the MediaAgent. This will ensure that the MediaAgent can successfully communicate with the CommServe.

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