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Does DPM 2010 support the environment configured at CSV on MS-ISCSI Target? RRS feed

  • Question

  • Hi,

    I am trying to take the backup of Hyper-V r2 guest machines configured at Cluster Shared Volume.

    Cluster Shared Volume is being configured through Microsoft iSCSI Software Target on Storage Server 2008 R2.

    At this environment, Live-Migration and Quick-Migration are working well, among each Hyper-V host.

    Then, I've configured DPM2010 into each cluster node.

    Now I am trying to select the Guest Machine running at CSV, but I am encountering the following error.

    --------------------------------------------------

    "One or more prerequisites for protecting this data source is missing".

    Ensure that the following prerequisite software is installed on all the nodes in the cluster:

    (The URL for KB975921 and KB97354)

    ---------------------------------------------------

    I already applied the above fix programs and the Power-Shell Script following URL, but I am encountering the similar error.

    http://www.ms4u.info/2010/08/event-id-1584-backup-application.html

    http://robertanddpm.blogspot.com/2010/07/enabling-serialized-backup-of-hyper-v.html

    I am understanding that DPM2010 uses the VSS Hardware/System Provider in order to take backup at CSV. So I guess it is basic to prepare the Storage Hardware such as EMC, Equallogic, IBM...

    However, If I could achieve taking backup of the Hyper-V guest machine on CSV which is being configured at MS-ISCSI Target through DPM2010, It must be helpful to evaluate the behavior of CSV Backup through DPM before preparing of the Physical Storage.

    I am looking for the best practice to configure DPM2010 + CSV on MS-ISCSI. Otherwise, I want to know whether such configuration is being supported.

    Thanks in advance.

    komazow

    Friday, October 29, 2010 7:48 AM

Answers

  • Yes DPM can take backups of Hyper-V guests which reside on a CSV which is configured on MS iSCSI via the system provider. With this said you can also install the MS iSCSI target hardware provider as a means to increase the backup performance for your Hyper-V guests.

    Installing the Microsoft iSCSI Software Target Hardware Providers
    http://technet.microsoft.com/en-us/library/dd573327(WS.10).aspx
    Cheers, Tyler F [MSFT] - This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, November 19, 2010 1:56 PM
    Moderator

All replies

  • DPM absolutely supports backup of VMs which reside on an iSCSI presented CSV. Typically in an iSCSI implementation the network is the bottleneck. The links below should offer you some additional information/guidance on the subject:

    Understanding Protection for CSV
    http://technet.microsoft.com/en-us/library/ff634189.aspx

    Considerations for Backing Up Virtual Machines on CSV with the System VSS Provider
    http://technet.microsoft.com/en-us/library/ff634192.aspx

    Considerations for Backing Up Virtual Machines on CSV with Hardware VSS Providers
    http://technet.microsoft.com/en-us/library/ff634220.aspx

    How to protect Hyper-V with DPM 2010 whitepaper
    http://www.microsoft.com/downloads/en/details.aspx?displaylang=en&FamilyID=c9d141cf-c839-4728-af52-928f61bebdca


    Cheers, Tyler F [MSFT] - This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, October 29, 2010 9:35 PM
    Moderator
  • Thank you for replying.

    DPM2010rc whitepaper is explaining the following "Additional Considerations".
    Does that mean DPM2010 can take backup Hyper-V guests configured into CSV on Microsoft Software ISCSI Target through VSS software provider, instead of VSS Hardware Provider?
    I am searching a document describing typical steps to configure DPM2010 host for such environment.

    Thanks in advance.

    komazow

    >--------------------------------------------------
    >Additional Considerations
    >
    >You should take the following into consideration when preparing to use DPM 2010 to protect virtual machines hosted under Hyper-V:
    >
    >If the Hyper-V host will use Cluster Shared Volumes (CSV), ensure that the appropriate Volume Shadow Copy Services (VSS)
    >hardware provider is installed. The VSS hardware provider allows you to back up multiple VMs simultaneously.
    >If the VSS hardware provider is not available, the VSS software provider is used and backup jobs are serialized.
    >--------------------------------------------------

    Saturday, October 30, 2010 1:28 PM
  • Yes DPM can take backups of Hyper-V guests which reside on a CSV which is configured on MS iSCSI via the system provider. With this said you can also install the MS iSCSI target hardware provider as a means to increase the backup performance for your Hyper-V guests.

    Installing the Microsoft iSCSI Software Target Hardware Providers
    http://technet.microsoft.com/en-us/library/dd573327(WS.10).aspx
    Cheers, Tyler F [MSFT] - This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, November 19, 2010 1:56 PM
    Moderator
  • If the above suggested answer does not help in resolving the thread then please re-open it.
    Cheers, Tyler F [MSFT] - This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, November 19, 2010 1:57 PM
    Moderator
  • Yes DPM can take backups of Hyper-V guests which reside on a CSV which is configured on MS iSCSI via the system provider. With this said you can also install the MS iSCSI target hardware provider as a means to increase the backup performance for your Hyper-V guests.

    Installing the Microsoft iSCSI Software Target Hardware Providers
    http://technet.microsoft.com/en-us/library/dd573327(WS.10).aspx
    Cheers, Tyler F [MSFT] - This posting is provided "AS IS" with no warranties, and confers no rights.

    I would just like to warn anyone stumbling upon this thread searching for whether the MS iSCSI target hardware VSS provider is suitable for use with Data Protection Manager 2010 that it is not compatible. In this light, appliances built on Windows Storage Server 2008 are useless for Hyper-V with CSV and DPM. Unlike what is stated above, installing the hardware VSS provider will not speed up your backups, neither does it solve the redirected access problem you have with the software VSS provider.
    Thursday, March 24, 2011 9:21 PM
  • I would just like to warn anyone stumbling upon this thread searching for whether the MS iSCSI target hardware VSS provider is suitable for use with Data Protection Manager 2010 that it is not compatible. In this light, appliances built on Windows Storage Server 2008 are useless for Hyper-V with CSV and DPM. Unlike what is stated above, installing the hardware VSS provider will not speed up your backups, neither does it solve the redirected access problem you have with the software VSS provider.

     

    I am in a similar situation, WSS 2008R2, two node Hyper-v Cluster on CSV and running back and forth to get DPM 2010 up and running. With quite little success by now. After spending some time on the net, this statement sounds like true to me, simply WSS is not compatible with DPM !?

    But hey, this leads myself to a big WTF? I think this should absolutely be possible. Is there a chance this is being fixed in time? (I am quite unhappy with the idea of throwing out the shiny new WSS just for backup compatibility...)

    Tuesday, March 29, 2011 1:20 PM