Dell Computer Drive manual Creating the Snapshot Using the Simple Path

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3Remove the drive letter(s) of the source in Windows or unmount the virtual drive(s) in Linux to help guarantee a stable copy of the drive for the Snapshot. If this is not done, the snapshot operation will report that it has completed successfully, but the snapshot data will not be updated properly.

NOTE: Verify that the virtual disk has a status of Optimal or Disabled by clicking the Summary tab and then clicking Disk Groups & Virtual Disks.

4Follow any additional instructions for your operating system. Failure to follow these additional instructions can create unusable snapshot virtual disks.

NOTE: If your operating system requires additional instructions, you can find those instructions in your operating system documentation.

After your host server has been prepared, see "Creating the Snapshot Using the Simple Path" on page 71 to create the snapshot using the simple path.

If you want to use a snapshot regularly, such as for backups, use the Disable Snapshot and Re-create Snapshot options to reuse the snapshot. Disabling and re-creating snapshots preserves the existing virtual disk-to-host mappings to the snapshot virtual disk.

Creating the Snapshot Using the Simple Path

NOTE: Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux will help to guarantee a stable copy of the drive for the Snapshot.

After first preparing the host server(s) as specified in the preceding procedure, complete the following steps to create a virtual disk snapshot using the simple path:

1In MD Storage Manager, click the Configure tab, and then click Create Snapshot Virtual Disks.

2The Additional Instructions dialog appears; click Close in this dialog to continue.

3Click the plus sign (+) to the left of the disk group to expand it, then click the virtual disk from which you want to create a snapshot.

4Click Next.

A No Capacity Exists warning appears if there is not enough space in the disk group of the source virtual disk to create the snapshot.

Snapshot Virtual Disks

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Contents W . d e l l . c o m s u p p o r t . d e l l . c o m Dell PowerVault Modular Disk Storage Manager User’s GuideFebruary Contents Connecting the Serial Cable System Setup for Password Reset Viewing iSCSI Statistics and Setting Baseline Disk Groups and Virtual Disks Premium Feature-Snapshot Virtual Disks Troubleshooting Problems 101 Contents User Interface About This GuideModify Tab Configure TabSummary Tab Support Tab Tools TabISCSI Tab View online help View the event log Other Information You May NeedAbout Your Storage Array Access Virtual DiskOut-of-Band and In-Band Management Manual Addition of a Storage Array Adding Storage ArraysAutomatic Discovery of Storage Arrays Removing Storage Arrays Naming Storage ArraysInitial setup tasks include Setting Up Your Storage ArrayStorage Array Storage Array Support Data Setting a PasswordTo set, change, or remove a password for a storage array Consider these guidelines when you create a password Resetting a PasswordPassword Guidelines Connecting the Serial CableMicrosoft Windows Operating Systems System Setup for Password ResetReset Password Changing Expansion Enclosure ID Numbers Configuring Alert NotificationsConfiguring E-mail Alerts Storage Array Configuring Snmp Alerts Starting or Restarting the Host-Agent Software in Linux Starting or Restarting the Host-Agent Software in WindowsStorage Array Storage Array Using the iSCSI Tab Using iSCSICreating Chap Secrets Changing the iSCSI Target AuthenticationEntering Mutual Authentication Permissions Valid Ascii Characters for Chap Secrets Space Using iSCSI Type the alias in the iSCSI target alias field and click OK Changing the iSCSI Target IdentificationChanging the iSCSI Target Discovery Advanced iSCSI Host Ports Settings Configuring the MD3000i iSCSI Host PortsViewing or Ending an iSCSI Session Lowest priority defaultViewing iSCSI Statistics and Setting Baseline Statistics Edit, Remove, or Rename Host Topology Host Topology Actions Desired Action Using iSCSI Enabling the Event Monitor Service Status area, click Start LinuxEvent Monitor Disabling the Event Monitor About Your Host Configuring Host AccessManual Configuration using SAS HBA Automatic ConfigurationClick Next Manual Configuration using iSCSIRemoving Host Access Adding a Host to a Host Group Host GroupsCreating a Host Group Moving a Host to a Different Host Group Removing a Host From a Host GroupRemoving a Host Group Host TopologyHost Context Agent Failover with Red Hat Enterprise Linux Create a virtual disk and map it to LUN Reboot the hostData Path Protection About Your Host Disk Groups and Virtual Disks Creating Disk Groups and Virtual Disks Manual Configuration Disk Groups and Virtual Disks Disk Groups and Virtual Disks Hot Spare Drive Protection Automatically Configuring Hot SparesClick OK in the dialog box Manually Configuring Hot SparesModifying and Removing Host-to-Virtual Disk Mapping Host-to-Virtual Disk MappingCreating Host-to-Virtual Disk Mappings Changing Controller Ownership of the Virtual Disk Storage PartitioningVirtual Disk Expansion Disk Group and Virtual Disk ExpansionDisk Group Expansion Storage Array Media Scan Changing Media Scan SettingsErrors discovered by the media scan include Suspending the Media Scan Microsoft ServicesVirtual Disk Service Volume Shadow-Copy Service Disk Groups and Virtual Disks Premium Feature-Snapshot Virtual Disks About the Simple Path Creating a Snapshot Virtual Disk Using the Simple PathHost-to-Virtual Disk Mapping The default setting is Map now SMrepassist -ffilename-identifier Creating the Snapshot Using the Simple Path Snapshot Virtual Disks About the Advanced Path Creating a Snapshot Virtual Disk Using the Advanced PathSnapshot Virtual Disks SMrepassist -ffilename-identifier Creating the Snapshot Using the Advanced Path Snapshot Virtual Disks Source-virtual disk-name-sequence-number Specifying Snapshot Virtual Disk NamesSnapshot Repository Capacity Disabling a Snapshot Virtual Disk Re-creating Snapshot Virtual DisksPreparing Host Servers to Re-create a Snapshot Virtual Disk To disable a snapshot virtual diskRe-creating a Snapshot Virtual Disk Premium Feature-Virtual Disk Copy Reasons to use virtual disk copy include the following Creating a Virtual Disk Copy for an Mscs Shared DiskVirtual Disk Read/Write Permissions If you are using the target virtual disk for backup purposesVirtual Disk Copy Restrictions Preparing Host Servers to Create a Virtual Disk Copy Creating a Virtual Disk CopyClick Next at the bottom Copying the Virtual DiskChoose the target virtual disk Storage Array Performance During Virtual Disk Copy Setting Copy PriorityClick Yes to stop the virtual disk copy Stopping a Virtual Disk CopyRecopying a Virtual Disk To stop a virtual disk copy, complete the following stepsPreparing Host Servers to Recopy a Virtual Disk Recopying the Virtual Disk Removing Copy Pairs Virtual Disk Copy Downloading RAID Controller and Nvsram Packages Firmware DownloadsDownloading Both RAID Controller and Nvsram Firmware Downloading Non-redundant Mscs Nvsram Firmware Downloading Only Nvsram FirmwareDownloading Physical Disk Firmware Downloading EMM Firmware 100 Device Health Conditions Troubleshooting ProblemsRecovery Guru Storage Array Profile102 SMrepassist Utility103 Support Information PackageClick Browse Unidentified Devices Recovering from an Unidentified Storage Array105 Ping host-name-or-IP-address-of-the-hostTroubleshooting 107 Removing an EMM from the Expansion EnclosureInserting an EMM into an Expansion Enclosure 108 MD3000 Maintenance ConsiderationsRemoving and Inserting Physical Disks 109 110 111 IndexIndex 113 114