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Mounting and Unmounting Snapshots

You can mount any available snapshot to access the data included in the snapshot.

For Oracle, Oracle RAC, SAP Oracle, and Sybase, you have the option to mount any available snapshot on a MediaAgent.

Before you Begin

  • For VMware agents, by default, the snapshot will be exposed to the first Host Bus Adapter (HBA) on the ESX Server. To expose the snapshot to a specific HBA, configure the sPortInfo additional setting.

    If required, you can configure the niSCSIEnable additional settings, for SnapProtect backups to always try mount using the iSCSI method. If this additional setting is not configured, SnapProtect backup tries to mount using the Fibre Channel method first. To add or edit an additional setting, follow the steps in Add or Modify an Additional Setting.

  • For Windows File System agents, GUI mount for FileSystem with CIFS share is not supported.
  • For Oracle ZFS arrays, to avoid failures when mounting, observe the following:
    • If the proxy server supports both iSCSI and FC HBA, use FC HBA and make sure to have the following:
      • FC HBA on the proxy server is zoned to the Oracle ZFS array. In this case, if the source LUN is connected via iSCSI, associate it with target group “All Targets” on the array. If the source LUN is connected via FC, the existing FC target association is sufficient.

    After a mount operation on the proxy server, a snapshot will have the same properties as it’s LUN has, for example, the target group associated to the source LUN will also be associated to the snapshot

  • For Pure Storage arrays, create the host in the array with a dummy LUN before attempting to mount on the proxy.

Warning:

  • If you do not select Protect Snapshot during mount, the changes made to the snapshot when it is mounted will be retained after the snapshot is unmounted and the snapshot can no longer be used for restore.
  • For Windows-based agents, select Protect Snapshot during mount to ensure that the changes made to the snapshot while it is mounted are not retained when you unmount the snapshot. By selecting this option, the snapshot is usable for future snap operations (restore, backup copy, etc.). If this option is disabled, changes made to the snapshot while it is mounted are retained after the snapshot is unmounted. As a result, you cannot use the snapshot for snap operations.

Procedure

  1. From the CommCell Browser, expand Client Computers > client > agent.
  2. Right-click the appropriate backupset, subclient or instance, and then click List Snaps.

    Note:

    • For VMware, by default, the snapshot will be mounted on the ESX server configured for SnapProtect backup. The ESX Server name and Logon account will be displayed in the Mount Path dialog box.  If you want to mount the snapshot to a different ESX server, click Override Default Selection check box and click Select ESX server for snap mount. In the Browse ESX Server dialog box, select the required ESX server and click OK.

      By default, the snapshot will be exposed to the first Host Bus Adapter (HBA) on the ESX Server. To expose the snapshot to a specific HBA, configure the sPortInfo additional setting.

      When the mount operation completes, the Mount Operation Completed Successfully message will be displayed .

  3. Right-click the snapshot and click Mount or Unmount.

    Tip: To select multiple snapshots, hold <Shift> key and select the snapshots to be mounted. In the Mount or UnMount dialog box, click Yes.

    Optional: If the snapshot does not get unmounted, select the Force Unmount option to mark the snapshot as unmounted.

  4. In the Mount Path dialog box, specify the destination client and the path on the client in the Destination Client and Destination Path fields.

    For Oracle ASM snapshots on a MediaAgent, specify the ASM diskgroup name to be used for the snapshot, e.g. "+ASMSNAP", in the Destination Path field.

    On a Windows platform, enter a CIFS Share Name for the agent.

  5. If you do not wish to save any changes made to the mounted snapshot after the snapshot is unmounted, select Protect Snapshot during mount.
  6. Click OK.