Final answer:
Block-level backup in Windows Server Backup reads blocks in the order they appear on the disk, resulting in a more efficient backup process by bypassing file system metadata.
Step-by-step explanation:
The advantage of using block-level backup in Windows Server Backup is that the blocks are read in the order they appear on the disk. This type of backup reads and copies the disk blocks directly, rather than processing the files individually.
It tends to be more efficient because it can ignore unused portions of the disk and can handle the data in larger chunks, which speeds up the backup process. By reading the blocks in the order they appear on the disk, it also avoids the overhead associated with the file system metadata, which can further increase efficiency.