Which of the following is not a necessary restriction for FusionCompute virtual machine live migration?

Regarding the description of HDA, which of the following is incorrect?

During the daily operation and promotion of FusionAccess, Huawei desktop cloud administrators can use the TCM tool to manage virtual desktops, making self-service maintenance more convenient and greatly improving operational efficiency.

In FusionCompute, the vlan pool provides VLAN resources for virtual machines that use vlan-type port groups. The port group must be configured with five VLLAN ID. The VLAN must be within the range of the VLAN resources provided by the VAN pool.

In storage virtualization, all user storage is presented in the form of files, and virtual machine disks, snapshots, and virtual machine configurations all correspond to an independent file.