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vinay1's avatar
vinay1
Level 3
10 years ago

VM backup failed - snapshot error encountered(156)

Hi Guys, I have a netbackup 7.5 and one of the VM got failed. below is the logs details of job failure. 3/1/2015 6:59:31 PM - snapshot backup of client ServerName.domain.com using method VMware...
7.5
Backup and Recovery
NetBackup
Windows Server (2003-2008)
  • SymTerry's avatar
    SymTerry
    10 years ago

    TECH145960 talks about 156. The error "Failed to quiesce the virtual machine" is caused when The I/O in the virtual machine is very high and the quiesce operation is unable to flush all the data to disk as more and more I/O is being created. 

    Solution

     
     

    This can be:
    1) An issue with VSS in the guest VM:
    Check for VSS errors in the event logs on the problem VM
    If errors then apply the VSS rollup package from MS

    2) An issue with vmware tools:
    a) check that the latest version of vmware tools is installed
    If not then install from ESX console (selecting interactive install will allow you to select the FULL / COMPLETE  installation NOT the TYPICAL)

    b) restart the vmware tools service in the guest

    c) uninstall and re-install vmware tools on the client
    select FULL / COMPLETE  installation - not the TYPICAL installation

    3) A high I/O guest
    adjust the snapshottimeout registry setting on the VM Backup Host under
    HKEY_LOCAL_MACHINE >SOFTWARE> VERITAS > NETBACKUP> CURRENTVERSION > CONFIG>BACKUP

    4) If all above actions checked then refer to VMware to verify additional issues