When you select disk-based protection, you must allocate space on the storage pool for the replicas and recovery points for each data source that you want DPM to protect. You must also allocate space on protected file servers or workstations for the change journal. DPM recommends and allocates disk space for your protection group based on the size of the data to be protected. You can modify the disk space in the storage pool; however, there are guidelines you must follow to increase the allocated disk space. For more guidelines about allocating disk space, in the DPM Planning Guide, see Planning Protection Groups.

To allocate space for the protection group

  1. On the Review Disk Allocation page, review the space allocations that DPM recommends for the protection group. DPM lists the disk spaced that is allocated for your protection group based on the size of the selected data.

    Accept the default space allocations unless you are certain that they do not meet your needs.

  2. On the Review Disk Allocation page, do the following:

    1. Accept the recommended allocations, or click Modify to change the disk space allocation on the DPM server and the protected computer, or to specify a custom volume.

    2. On the Modify Disk Allocation page, on the DPM Server tab, select from the following:

    • Storage type. Select the storage location. Your options are Storage pool or Custom volume.

    • Replica Volume. Type the disk space for the replica volume, or select the custom volume to use for the replica volume.

    • Recovery Point Volume. Type the disk space for the recovery point volume, or select the custom volume to use for the recovery point volume.

    • Custom Volume. Select the custom volume.

      Any volume that is attached to the DPM server can be selected as a custom volume except the volume that contains the system and program files.

      DPM cannot manage the space in custom volumes. If DPM alerts you that a custom replica volume or recovery point volume is running out of space, you must manually change the size of the custom volume by using Disk Management.
    • Calculate. Click this link to calculate the data size for the data source.

  3. Select the Co-locate data in DPM Storage Pool checkbox to co-locate your data. Co-locating your data allows you to have multiple data sources mapping to a single replica and recovery point volume, enabling you to store data more efficiently on the DPM server.

    Note that when you co-locate your data, the data sources will share a volume, and will also share recovery points. Removing the recovery point for any one of the co-located data sources will mean losing recovery points of the other data sources sharing this volume.

    If you have not selected any co-locatable data sources, this option will be grayed out. DPM supports co-location for the following data sources:
    • Hyper-V virtual machines

    • Laptop/desktop

    • SQL Server 2005 and SQL Server 2008 databases

  4. Select the Automatically grow volumes checkbox to automatically allocate volumes when more disk space is required for protecting the selected data source for the specified retention range.

  5. When you finish specifying the new allocations, click OK, and then click Next.