How Does Windows Server Backup Compression Actually Work

Posted by @Cody

December 22, 2016

Do you want to know the Windows Server Backup compression ratio? This article will tell you how to configure a compressed server backup.

About Windows Server Backup

Windows Server Backup (WSB) was first introduced in Windows Server 2008 as replacement for the built-in Windows NTBackup utility. Microsoft, of course, has made some improvements that users like and some differences that users find annoying. Many users are wondering what the Windows Server Backup compression ratio is. Though Windows has made improvements on every new edition of WSB, Windows Server 2008R2 backup compression and Windows Server 2012 backup compression are the same.

If are familiar with WSB, you probably know that it uses VHD, which represents a virtual hard disk, File format to save backups. The VHD can be directly used in Hyper-V virtual machine. You can also mount the VHD file as a virtual drive in Disk Management and then you can view what was included in the backup. Due to the convenience of VHD files, WSB does not compress the backup. You may see that a full server backup is usually smaller than data itself, because page files, temporary files, and some other files will not be included in the backup. If you really need to create compressed backups, you can use Windows Server Backupper alternative.

How to create a compressed backup

It is a good habit to keep more than one backup because developers. If all the backups you created are not compressed, they will likely take a lot of disk space. Therefore, you need a backup tool to perform compressed backup. Luckily, AOMEI Backupper Server not only allows you to create backups with 3 different compression levels, but also give you the incremental backup and differential backup options. You can refer to the steps below to create a compressed system backup:

1. Download, and run this server backup software.

2. Click “Backup” and then choose “System Backup”. If you want to backup the entire hard drive, you can choose “Disk Backup” instead.

System Backup

3. In the next screen, click “Step 2” to select a destination location to receive the image backup as the source has already be included in “Step 1”.

Backup System

4. Click “Backup Options”, and “Compression” tab. Then you can choose one of the three compression levels, which are None, Normal, High. The Normal one is selected by default.


5. When the extra settings are done, click “Start Backup” to start the backup.

As you can see, Windows Server backup compression can easily managed with AOMEI Backupper. If you set up a scheduled backup, you can enable backup scheme to automatically delete old backups. What’s more, it is also supported to restore to dissimilar hardware.