VBS works only when the EVS disk is available or in use. If you have performed operations, such as capacity expansion, attaching, detaching or deletion, on an EVS disk to be backed up, refresh the page before performing the backup. VBS supports backup of only one EVS disk each time.
If you have an EVS disk attached to an ECS as a system disk, it is recommended that the disk backup be performed only when the ECS is in the running, stop, or hibernation state. Otherwise, the backup may fail because of a timeout.
Currently, VBS cannot encrypt the backup data in encrypted EVS disks.