This section explains how to use VBS to ensure data security in different scenarios, its limitations, and its typical operations.
VBS applies to the following scenarios:
Production storage devices on the cloud platform have faults.
System faults cause data losses (for example, the billing system malfunctions and the system incorrectly delivers resource deletion commands) and application system faults on a user's guest OSs.
User misoperations cause data loss and system bootup failures.
VBS works only on EVS disks. For details, see Creating a VBS Backup.
You can use a VBS backup to restore an EVS disk to the time when the backup was created.
Before restoring the disk data, stop the server to which the EVS disk is attached and detach the EVS disk from the server. After the restoration is complete, re-attach the EVS disk and start the server. For details, see Data Restoration Using a VBS Backup.
After an EVS disk is created using a data backup, the initial data of the new EVS disk is the same as the initial backup data. For details, see Create an EVS Disk Using a VBS Backup.