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Replicas on ISCSI SAN, not local drives

    Question

  • Using DPM 2012 R2, we have 18 terabytes of ISCSI SAN storage and 18 terabytes of SATA storage. For some reason DPM put most of the replicas on the SAN storage instead of the local drives. The SAN storage has 19% free space while the local storage has 86% free space. Why would DPM do that? Is there any was to get DPM to use the local storage first?

    Is there a way to move replicas from the SAN to the local storage?  I looked at using MigrateDataSourceDataFromDPM but the documentation says once you move data from one disk to another it stops using the old disk at all, which is not what I want.

    Tuesday, May 01, 2018 3:17 PM

All replies

  • Hi,

    it is quite some time ago but I think that you can use the script to migrate single Sources without "removing" the Disk from DPM.

    Take a look at this:https://gallery.technet.microsoft.com/Migrate-DPM-Disk-or-dea8d4e9

    and first try within Test VM

    regards

    /bkpfast


    My postings are provided "AS IS" with no warranties and confer no rights

    Wednesday, May 02, 2018 9:47 AM
  • Hi Craig,

    By using the MigrateDataSourceDataFromDPM.ps1 the old volumes on the old disk must be left active until the retention time has run out. DPM will then automatically unallocate those old volumes.
    After the script has run successfully DPM will start to write the new data on the new disk.

    1. Connect the new disk to the DPM server.
    2. Open DPM’s own PowerShell console.
    3. Extract the Different protection groups on the DPM server to a variable with the following command $PG = Get-ProtectionGroup DPMServer.
    4. Next get all the data source for a protection group $DS = Get-Datasource $PG[0]
    5. Check which disks are connected to the DPM server $Disk = Get-DPMDisk –DPMServerName
    6. Now you can start the migration using the MigrateDatasourceDataFromDPM.PS1 script./MigrateDatasourceDataFromDPM.ps1 –DPMServerName –Source $DS –Destination $Disk[4]

    Note you don't need to migrate all data from your iSCSI SAN disks, this way you will still use them.

    Kind regards,
    Leon


    Please remember to mark the replies as answers if they help.

    Thursday, May 03, 2018 9:55 PM