# FAQs

- What Are the Differences Between CSBS and VBS?
- Does VBS Support Simultaneous Backup of All EVS Disks on a Server?
- Do I Need to Stop the Server Before Backing Up EVS Disks on a Server Using VBS?
- Does VBS Support Cross-Region Backup and Restoration?
- Do I Need to Stop the Server Before Restoring EVS Disk Data with a VBS Backup?
- Why Are CSBS Backups Displayed on the VBS Backup Page?
- Can a VBS Backup of a System Disk Be Used to Restore the System Disk of an ECS?
- Can I Use a VBS Backup to Restore an EVS Disk Whose Capacity Has Been Expanded?
- Is There a Quota Limit on the Number of Backups?
- What Can I Do In Case of Exceptions in VBS?
- Why Add Tags to a VBS Backup or Backup Policy?
- Does Backup Can Be Performed Several Times a Day?
- Can a Disk Only Be Associated With One Policy?
- What Are Full Backup and Incremental Backup?
- What Are the Differences Between Backups and Snapshots?
- Why Is the Remaining Space Not Changed After a Backup Is Deleted?