On a Windows server, Druva instructs Microsoft Volume Shadow Copy Services (VSS) to create shadow copies of server data during backup. Druva uses these shadow copies to create a backup of your server data. By default, VSS writes the shadow copies of a volume to a location on the volume itself. This can result in high I/O operations on the volume because VSS writes shadow copies and Druva reads the shadow copies from this same volume. Additionally, the volume might experience low disk space problems and a high I/O wait time. To avoid these issues, we recommend that you create a separate volume and configure VSS to write shadow copies to this volume.

📝 Note
​You can configure VSS to write shadow copies to existing volumes. However, to avoid issues such as high I/O wait time and low disk space on these volumes, we recommend that you assign a volume for shadow copies, and then configure VSS to write shadow copies of other volumes to this volume.

Before you begin, ensure that the volume to which you want VSS to write shadow copies has sufficient free space. We recommend that you configure VSS to write shadow copies to a separate volume assigned for this purpose.

📝 Note
​Ensure that you set the file system of this volume to NTFS.