Acronis Backup for Windows Server Essentials - User Guide - Manual (Page 120)

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The preset is: Disabled.
Tip. You can back up Hyper-V virtual machines residing on a cluster shared volume by backing up the required
files or the entire volume with file-level backup. Just power off the virtual machines to be sure that they are
backed up in a consistent state.
Example
Let's assume that the C:\Data1\ folder is a mount point for the mounted volume. The volume
contains folders Folder1 and Folder2. You create a backup plan for file-level backup of your data.
If you select the check box for volume C and enable the Mount points option, the C:\Data1\ folder in
your backup will contain Folder1 and Folder2. When recovering the backed-up data, be aware of
proper using the Mount points option for recovery (p. 162).
If you select the check box for volume C, and disable the Mount points option, the C:\Data1\ folder
in your backup will be empty.
If you select the check box for the Data1, Folder1 or Folder2 folder, the checked folders will be
included in the backup as ordinary folders, regardless of the state of the Mount points option.
4.7.17 Multi-volume snapshot
This option is effective only for Windows operating systems.
This option applies to disk-level backup. This option also applies to file-level backup when the
file-level backup is performed by taking a snapshot. (The File-level backup snapshot (p. 116) option
determines whether a snapshot will be taken during file-level backup).
The option determines whether to take snapshots of multiple volumes at the same time or one by
one.
The preset is: Enable.
When this option is set to Enable, snapshots of all volumes being backed up will be created
simultaneously. Use this option to create a time-consistent backup of data spanned across multiple
volumes, for instance for an Oracle database.
When this option is set to Disable, the volumes' snapshots will be taken one after the other. As a
result, if the data spans across several volumes, the resulting backup may be not consistent.
4.7.18 Pre/Post commands
This option is effective for Windows and Linux operating systems and PE-based bootable media.
The option enables you to define the commands to be automatically executed before and after the
backup procedure.
The following scheme illustrates when pre/post commands are executed.
Pre-backup
command
Backup Post-backup
command
Examples of how you can use the pre/post commands:

Delete some temporary files from the disk before starting backup.

Configure a third-party antivirus product to be started each time before the backup starts.