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By default, the VSS backup is enabled.īackup with VSS activates all of the available VSS writers. After setting the task properties, disable (or enable) the option Backup with VSS.
WINDOWS SHADOW COPY SPACE REQUIREMENTS WINDOWS
In the Main Selection -> Tasks -> By Clients, select your Windows client and then click the backup task for which you want to change the properties or click New Backup Task if you are creating a new task. If the autoupdate is running while backup with VSS is in progress, it may cause the backup job to fail with WIN32 API error: 21 – The Device is not ready. For details, see Standard Restore Procedure.Įnsure that Windows AutoUpdate is disabled during a backup with VSS. This enables standard restore of data backed up with VSS. The file system data on the saveset is stored with the original location, e.g., C:\.
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Once the backup is complete, VSS instructs running applications to resume normal operation. SEP sesam backs up the selected data immediately after VSS takes a snapshot of the selected data. VSS writers communicate with running applications and ensure that the data is set to a consistent state and to stay consistent during the shadow copy creation. When performing a VSS backup, SEP sesam as a requester requests a backup of the file system data specified in the backup task. All other task types, for example System State, use the required VSS writer by default. SEP sesam backup with VSS supports copy, full, differential, and incremental backups of the file system, therefore the option Backup with VSS should only be used with the task type Path.
WINDOWS SHADOW COPY SPACE REQUIREMENTS FREE
It is recommended that least 1 gigabyte of free disk space on each volume if the volume size is more than 1 gigabyte. For volumes more than 500 megabytes, the minimum is 320 megabytes of free space. Microsoft article Troubleshoot VSS issues provides the following information: For volumes less than 500 megabytes, the minimum is 50 megabytes of free space.
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Make sure that the minimum required disk space for shadow copy creation is available.Note that the total amount of snapshots also includes snapshots that might be created with another application/for another purpose. If the restricted total amount of created volumes is exceeded, the VSS backup will fail. Even though Windows has a limit of up to 512 shadow copies per volume, a maximum of 64 shadow copies can be maintained.VSS is provided on Windows operating system versions beginning with Windows XP.Once the snapshot is created, they let the applications resume. They ensure that their data is quiescent and in a consistent state. Writers: Services that prepare applications for snapshot creation and backup.It also communicates with writers to gather system information and to signal writers to prepare their data for backup.
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