VADP Transport Mode in case of restore

Last post 07-15-2010, 4:01 AM by leighs. 7 replies.
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  • VADP Transport Mode in case of restore
    Posted: 07-06-2010, 1:26 PM

    Hello all,

    if I set thefollowing Registry Key to san:

    Location: HKEY_LOCAL_MACHINE\SOFTWARE\CommVault Systems\Galaxy\<Instance>\
    Key: VirtualServer
    Value: vStorageTransportMode
    Value Type: STRING
    Range: san, hotadd, nbd, nbdssl

    The backup is carried out as expected (via SAN). The restore (virtual machine restore direct to ESX server) anounces then first:

    2424 970 07/06 18:37:19 1991 CVMDiskInfo::Connect() - Selecting default transport mode: san

    and after a while:

    2424 ad8 07/06 18:38:56 1991 CVMDiskInfo::OpenDisk() - Opened to [XP-CV-Restore1] [New Virtual Machine.vmdk] using Transport mode: [nbd]

    I had the impression that the system should be able to do restores also direct via SAN? The restore finishes ok, but is using Network transfer.

    Does someone know why?

    -Bernd

  • Re: VADP Transport Mode in case of restore
    Posted: 07-06-2010, 1:51 PM

    Can you post the restore log along with identifying if the restore target is zoned to the proxy server?

  • Re: VADP Transport Mode in case of restore
    Posted: 07-06-2010, 5:03 PM

    Yes - it would be good to see what the vsvrst.log from the client shows. Please feel free to attach it to this thread.


  • Re: VADP Transport Mode in case of restore
    Posted: 07-07-2010, 9:18 AM

    Please find attached the vsvrst.log and a screenshor concerning the mounted volumes on the proxy and on the ESX server in question.

    Attachment: vsrst.txt
  • Re: VADP Transport Mode in case of restore
    Posted: 07-07-2010, 9:20 AM

    and the screenshot


    Attachment: VADP mapping.jpg
  • Re: VADP Transport Mode in case of restore
    Posted: 07-07-2010, 9:46 AM

    BerndMueller,

    Thank you for the details.  Ill take a look and report back.

  • Re: VADP Transport Mode in case of restore
    Posted: 07-07-2010, 9:49 AM

    Advanced Transport mode functionality for restore is not supported in 8.0.

    Only Backup will use advanced transport modes.

    -AsHwIN

     

     

  • Re: VADP Transport Mode in case of restore
    Posted: 07-15-2010, 4:01 AM

    It seems that even if Simpana did support SAN transport mode for restore, VDDK 1.1.1 does not, as per release notes known issues at: http://www.vmware.com/support/developer/vddk/VDDK-1.1.1-Relnotes.html

    This release of the VDDK has the following known issues:
    • Virtual Machines With Changed Block Tracking Enabled Cannot Be Restored Over SAN Transport Mode
    When changed block tracking (CBT) is enabled on a virtual disk, it is not possible to restore virtual machines using SAN transport mode. To avoid this issue, disable CBT for the duration of the restore.

     

    VDDK 1.2 is now out, released 12th July however the resolved issues section does not mention a fix for the above so unless you can test it's resolved then you need to turn off CBT for Simpana to have a fighting chance to use SAN transport mode (if it could).

     

     

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