We are focusing this guide on Windows 10, but the concept also should work on Windows 8. We hate spam as much as you! Unsubscribe any time Powered by follow. Tweet Share Submit. Important: Remember that modifying system files can further damage the installation if it is not done correctly. Use these steps at your own risk. Add your comment. Get the latest tutorials delivered to your inbox.
The minimum is 1. The maximum is For other types of shadow copies, there is no registry value that corresponds to MaxShadowCopies. The maximum number of shadow copies is per volume. Windows Server On cluster servers, MaxShadowCopies registry value's data may need to be set to a lower number. VSS allocates a shadow copy storage area or "diff area" to store data for shadow copies. The minimum size of the shadow copy storage area is a per-computer setting that can be specified by using the MinDiffAreaFileSize registry value.
If the MinDiffAreaFileSize registry value does not exist, the backup application can create it under the following registry key:. The data for this key is specified in megabytes. You should specify a number that is a multiple of If you specify a value that is not a multiple of 32, the next multiple of 32 will be used. Shadow copies might not function correctly if the MinDiffAreaFileSize registry value specifies a minimum size that is larger than the maximum size of the shadow copy storage area.
To specify the maximum size of the shadow copy storage area, use the Vssadmin add shadowstorage or the Vssadmin resize shadowstorage command.
To see the current maximum size, use the Vssadmin list shadowstorage command. If you have not set a maximum size, there is no limit to the amount of space that can be used. These registry values are supported only on Windows server operating systems.
If these registry values do not exist, the backup application can create them under the following registry key:. The value's data should be set to one of the following values. If you set OverallPerformanceSetting to 3, you must also specify performances settings for each volume individually. This value's data should be set as follows:. Any backup application that performs system state restore of SYSVOL should use this value to indicate whether the restore operation is authoritative or nonauthoritative.
This value is read by the DFSR service. If the SYSVOL registry value does not exist, the backup application should create it under the following registry key:. The value's data should be set to either "authoritative" or "non-authoritative" based on the system administrator's request. Skip to main content. The restriction to target the system state backup to any volume is a new feature in Windows Server and Windows Server R2.
If all the previous prerequisites aren't met, you may see shadow-copy loss when you do a backup. In worst condition, backup itself may fail because of the snapshot from which backup was taken is becoming lost while writing the backup.
Examples of a critical volume include the boot volume and the system volume. Typically, this critical volume is drive C. Backup and Recovery Overview for Windows Server Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback?
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