Article ID: 122652, created on Aug 14, 2014, last review on Aug 14, 2014

  • Applies to:
  • Virtuozzo 6.0


  1. VM backup cannot be created with:

    ~# prlctl backup myVM.test
    Backing up the VM myVM.test
    Unable to synchronize the virtual machine's file system. The backup process will continue without synchronization. To avoid this problem in the future, make sure that Parallels Tools are properly installed in the virtual machine.
    A full backup is being created for this virtual machine. Though an incremental backup is created by default, it cannot be made because the virtual machine has no full backups.
    Failed to backed up the VM: Unable to start the backup/restore tool. An error occurred while starting the backup/restore tool. Try to restart the physical server. If the problem persists, reinstall the application or contact your system administrator for assistance.
  2. /var/log/parallels.log contains following records:

    07-29 13:42:04.578 F /disp:2749:662730/ Start backup client: create /var/parallels/myVM.test.pvm/harddisk.hdd /var/parallels/backups/{bd7fe349-158b-4f06-b93e-7ec7b30e3689}/{67ca1dd5-0cc0-40cc-b810-28e0fb39f3a8} /var/parallels/backups/{bd7fe349-158b-4f06-b93e-7ec7b30e3689}/{67ca1dd5-0cc0-40cc-b810-28e0fb39f3a8}/harddisk.hdd.tib {704718e1-2314-44c8-9087-d78ed36b0f4e} /var/parallels/backups/{bd7fe349-158b-4f06-b93e-7ec7b30e3689}/{67ca1dd5-0cc0-40cc-b810-28e0fb39f3a8}/temp/harddisk.hdd --local --disp-mode --tib-out /var/parallels/backups/{bd7fe349-158b-4f06-b93e-7ec7b30e3689}/{67ca1dd5-0cc0-40cc-b810-28e0fb39f3a8}/base/ABackupOutFile.TJ2749 --last-tib 0
    07-29 13:42:04.581 I /disp:2749:662730/ BACKUP_PROTO client version 3
    07-29 13:42:04.594 D /disp:2749:662730/ [readFromABackupClient] EOF
    07-29 13:42:04.594 F /disp:2749:662730/ /usr/sbin/prl_backup_client exited with code 255
    07-29 13:42:04.877 F /disp:2749:662730/ Task '25Task_CreateVmBackupTarget' with uuid = {ab16cb76-66ac-4574-b0f0-451a36eb1715} was finished with result PRL_ERR_BACKUP_TOOL_CANNOT_START (0x80037032) )


"PRL_ERR_BACKUP_TOOL_CANNOT_START" error means that there is a problem starting /usr/sbin/prl_backup_client . Probably, /usr/sbin/prl_backup_client is missing or corrupted :

~# ll /usr/sbin/prl_backup_client
ls: cannot access /usr/sbin/prl_backup_client: No such file or directory

This utility is a part of package "parallels-server-vi-cli", if the utility is missing, then you probably do not have it installed. This can be checked by:

~# rpm -qa |grep parallels-server-vi-cli

If it is installed, you will see something like:

~# rpm -qa |grep parallels-server-vi-cli


Install "parallels-server-vi-cli" of the proper version, you can use yum install for it:

~# yum install parallels-server-vi-cli-x86_64

Search Words

An error occurred while starting the backup/restore tool


Unable to start the backup/restore tool

prl_backup_client: No such file or directory

Try to restart the physical server




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