LSU

The LSU page allows you to manage the logical storage units (LSUs) contained on OST storage servers on the DXi6900. You can view information about existing LSUs, add or edit LSUs, and delete LSUs.

To access the LSU page, on the OST page, click the LSU tab (see Figure 1).

Figure 1: LSU Page

Tasks

Use the LSU page to perform the following tasks:

The Logical Storage Unit List displays the following information for all LSUs on the DXi6900:

OST Service The status of the OST service. OST settings can be configured in Ready, Stopped, or Verifying state. The OST server is available for backup only in Ready state.
LSU Name The name of the LSU.
Storage Server The storage server that contains the LSU.
Physical Capacity The physical storage capacity of the LSU.
Automatic Image Replication

The status of Automatic Image Replication (AIR) for the LSU (Enabled or Disabled), as well as the configured targets (if any).

Note: To view details about the remote LSU if AIR is enabled, use the Edit Logical Storage Unit page (see Editing an LSU).
Active Connections The number of currently active connections to the LSU.
Backup Images The number of backup images on the LSU.
Description A brief description of the LSU (if available).

Additional Information

  • The LSU limit is 1000.
  • Click a column heading to sort the rows in the table by that column. Click the column heading again to reverse the sort order.
  • The connections of a storage server that are used equals the data streams plus one for each LSU polling. A backup job may generate more than one data stream if the data can be read in parallel. For example, a policy that is backing up A, B, C, and D drives of a Windows system can generate four data streams in parallel.

Add an LSU to a storage server to present the storage capacity of the DXi6900 as an LSU that is compatible with backup applications that support OST. You can add an LSU with a specific capacity, or you can add an LSU that uses the available capacity of the DXi6900.

Note: You must create a storage server before you can add an LSU (see Adding a Storage Server).

To add an LSU to a storage server:

  1. Click Add.

    The Add Logical Storage Unit page displays (see ).

    Add Logical Storage Unit Page

  1. Enter information about the LSU.

    Storage Server Select the storage server that will contain the new LSU.
    Available Capacity

    (Recommended for best performance) Select this option to add an LSU that uses the available capacity on the system.

    You cannot add an available capacity LSU to a storage server that already contains an LSU. Also, if you add an available capacity LSU to a storage server, you cannot add additional LSUs to that same storage server.

    Note: After you add an LSU that uses the Available Capacity option, you cannot change the LSU to use the Specific Capacity option. Instead, you must delete the LSU, then add a new LSU and choose the Specific Capacity option (see Deleting an LSU).
    Specific Capacity

    Select this option to specify the physical capacity of the LSU, and then enter the following information.

    • LSU Name - Enter the name of the LSU.
    • Physical Capacity - Enter the physical capacity of the LSU (1 to 1048576 GB).

    Note: Quantum recommends setting LSUs to maximum size (1048576 GB) because spanning them on a backup is not possible.
  2. (Optional) In the Description box, enter a brief description of the LSU.

  3. (Optional) Select the Enable Automatic Image Replication check box to automatically replicate (duplicate) data on the LSU to a remote LSU on another DXi .

    Automatic Image Replication (AIR) is disabled by default. If enabled, data on an LSU is automatically replicated to a remote LSU that resides on a DXi in a different NetBackup domain. The timing of the duplication, as well as the backup images that are duplicated, are determined by the storage lifecycle policies (SLPs) configured in NetBackup.

    OST AIR requires NetBackup 7.1 or higher. For information about configuring NetBackup for Automatic Image Replication, see the DXi-Series NetBackup and Backup Exec OST Configuration Guide (6-67079).

    Note: You must configure at least one remote user before you can enable Automatic Image Replication (see Manage Remote Users).

  4. If Automatic Image Replication is enabled, select the replication target you want to replicate images to. (You can select only a single target.) When images are replicated, data will be sent to the selected target.

  5. If Automatic Image Replication is enabled, specify the following information:

    Remote Storage Server Name

    The name of the remote storage server (on the target DXi ) to replicate data to. The source DXi and target DXi must reside in different NetBackup domains.

    Note: To configure the target DXi , see Replication Send.
    Remote LSU Name The name of the LSU in the remote storage server that will receive the replicated data.
    Remote User The OST user credentials to use for authentication on the remote (target) DXi . The selected remote user must match a local user on the Configuration > OST > Manage Users page on the target DXi (see Manage Users ).
  6. Click Apply.

Edit an LSU to change its capacity, description, or automatic image replication settings.

To edit an LSU:

  1. Select the LSU and click Edit.

    The Edit Logical Storage Unit page displays (see ).

    Edit Logical Storage Unit Page

  2. Enter information about the LSU:

    Note: If you are editing an LSU, the Name option cannot be changed.

    Physical Capacity

    (Specific capacity LSUs only) Enter the physical capacity of the LSU (1 to 1048576 GB).

    The physical capacity cannot be changed if the LSU has more than zero currently active connections. The number of active connections is displayed on the LSU page (see Logical Storage Unit List).
    Description (Optional) Enter a brief description of the LSU.

  3. (Optional) Select the Enable Automatic Image Replication check box to automatically replicate (duplicate) data on the LSU to a remote LSU on another DXi .

    Automatic Image Replication (AIR) is disabled by default. If enabled, data on an LSU is automatically replicated to a remote LSU that resides on a DXi in a different NetBackup domain. The timing of the duplication, as well as the backup images that are duplicated, are determined by the storage lifecycle policies (SLPs) configured in NetBackup.

    OST AIR requires NetBackup 7.1 or higher. For information about configuring NetBackup for Automatic Image Replication, see the DXi-Series NetBackup and Backup Exec OST Configuration Guide (6-67079).

    Note: You must configure at least one remote user before you can enable Automatic Image Replication (see Manage Remote Users).

  4. If Automatic Image Replication is enabled, select the replication target you want to replicate images to. (You can select only a single target.) When images are replicated, data will be sent to the selected target.

  5. If Automatic Image Replication is enabled, specify the following information:

    Remote Storage Server Name

    The name of the remote storage server (on the target DXi ) to replicate data to. The source DXi and target DXi must reside in different NetBackup domains.

    Note: To configure the target DXi , see Replication Send.
    Remote LSU Name The name of the LSU in the remote storage server that will receive the replicated data.
    Remote User The OST user credentials to use for authentication on the remote (target) DXi . The selected remote user must match a local user on the Configuration > OST > Manage Users page on the target DXi (see Manage Users ).
  6. Click Apply.

Delete an LSU if it is no longer needed. When you delete an LSU, all data stored on the LSU is lost.

Note: If you deleted the LSU from Veritas NetBackup or Veritas Backup Exec, you must wait several minutes before deleting the LSU from the DXi6900.

To delete an LSU:

1. Select the LSU in the Logical Storage Unit List.

You cannot delete an LSU if it has more than zero currently active connections. The number of active connections is displayed on the LSU page (see Logical Storage Unit List).

Note: You can select multiple LSUs to delete at once.

2. (Optional) Select the Force Delete LSU check box to delete LSUs that are not empty.

Normally, you cannot delete an LSU if it contains existing backup images. If for some reason you cannot remove files from the LSU, selecting the Force Delete LSU check box allows you to delete the LSU even though it is not empty.

3. Click Delete.