none
The miniport 'Microsoft Virtual Machine Bus Network Adapter' disconnected - po pridani VHD souboru

    Dotaz

  • Pred cca mesicem jsem resil problem s chvilkovou ztratou sitove konektivity virtualniho stroje pri zalohovani metodou Child Partition Backup na DPM 2010. Viz zde: http://social.technet.microsoft.com/Forums/cs-CZ/windowsservercs/thread/6a748b81-b492-4eb9-9a91-6d905bd5cb80

    Situace: OS vsech serveru Windows Server 2008 R2 Enterprise SP1, zalohovani probiha na DPM 2010.

    Strucne zopakuji popis problemu: v okamziku zalohy celeho virtualniho stroje, se v systemovem logu VM objevi udalost id 10, zdroj NETVSC, text "The miniport 'Microsoft Virtual Machine Bus Network Adapter' disconnected." Po velmi kratkem casovem okamziku (max 1-2 sekundy) je spojeni opet obnoveno (udalost id 9, zdroj NETVSC). Na DPM serveru je v inkriminovany casovy okamzik zalogovano hlaseni o neschopnosti komunikovat s timto virtualnim serverm. Nicmene zaloha jako takova probehne.

    Mel jsem podezreni na ovladac virtualniho sitoveho adapteru, ale dnes jsem zjsitil zajimavou vec: jen par desitek minut pred tim, nez se chyba zacala projevovat jsem v konfiguraci virtualniho serveru provedl jednu zmenu. A to pridani dalsiho virtualniho disku, na ktery jsem presmeroval stinove kopie ze dvou jiz existujicich svazku. Mate nekdo logicke vysvetleni, proc by pridani disku, respektive presmerovani stinovych kopii na teneto disk melo zpusobovat problemy se sitovou konektivitou pri zalohovani? Neni problem napriklad v tom, ze na jeden disk jsou presmerovany stinove kopie dvou svazku?

    BB


    BB
    4. ledna 2012 8:15

Odpovědi

  • Tak jsem nakonec zjistil, ze stinove kopie svazku umistene na jinem disku jsou prekazkou pro offline zalohu VM.

    Tri podminky pro online zalohu VM jsou:

    You can perform an online backup with no downtime on a running virtual machine when all of the following conditions are met:

    • Integration services are installed and the backup integration service has not been disabled.

    • All disks being used by the virtual machine are configured within the guest operating system as NTFS-formatted basic disks. Virtual machines that use storage on which the physical partitions have been formatted as dynamic disks or the FAT32 file system prevent an online backup from being performed. This is not the same as dynamically expanding virtual hard disks, which are fully supported by backup and restore operations.

    • Volume Shadow Copy Service must be enabled on all volumes used by the virtual machine with a specific configuration. Each volume must also serve as the storage location for shadow copies of the volume. For example, the shadow copy storage for volume C: must be located on C:.


    BB
    4. ledna 2012 15:30

Všechny reakce

  • Tak jsem pokrocil v hledani priciny: problem je v tom, ze v oakmziku, kdy se VM zacne zalohovat se na okamzik prepne do "save state". Duvodem jsou stinove kopie svazku umistene na vyhrazenem disku. Pokud stinove kopie svazku zrusim, pak zaloha probehne bez jakehokoliv vypadku.

    Ma existenece stinovych kopii svazku na dedikovanem disku nejaky vliv na zalohovani virtualniho stroje metodou child partition backup?


    BB
    4. ledna 2012 13:40
  • Tak jsem nakonec zjistil, ze stinove kopie svazku umistene na jinem disku jsou prekazkou pro offline zalohu VM.

    Tri podminky pro online zalohu VM jsou:

    You can perform an online backup with no downtime on a running virtual machine when all of the following conditions are met:

    • Integration services are installed and the backup integration service has not been disabled.

    • All disks being used by the virtual machine are configured within the guest operating system as NTFS-formatted basic disks. Virtual machines that use storage on which the physical partitions have been formatted as dynamic disks or the FAT32 file system prevent an online backup from being performed. This is not the same as dynamically expanding virtual hard disks, which are fully supported by backup and restore operations.

    • Volume Shadow Copy Service must be enabled on all volumes used by the virtual machine with a specific configuration. Each volume must also serve as the storage location for shadow copies of the volume. For example, the shadow copy storage for volume C: must be located on C:.


    BB
    4. ledna 2012 15:30