What are the different types of VHD files in Windows 7

Source: Internet
Author: User
Tags file size

The VHD file is divided into three types that can be created using Hyper-V Manager or by using the Windows Disk Management tool in Windows 7:

1. Fixed VHD. The fixed VHD file is assigned a virtual disk size that is the size of the virtual disk specified when the VHD was created. For example, if you create a virtual hard disk size of 2 GB, you will create a file size of approximately 2 GB, where part of the space is used for the internal VHD structure. The size of the fixed VHD does not change as the data is written to the virtual hard disk.

2. Scalable or dynamic VHD. At any given time, the size of the extensible or dynamic VHD file is the same size as the actual data that was written to the file. The file also increases dynamically as more data is written. For example, files that support a 2 GB virtual hard disk are initially about 2 MB in size on the host file system. As the data is being written to this virtual hard disk, the file grows until it reaches a capacity limit of 2 GB.

3. diff VHD. A differential VHD is similar to a dynamic VHD, but contains only the modified virtual disk blocks of the associated parent virtual disk. The differential VHD is linked to a specific parent VHD, called a child VHD. The parent VHD file is read-only, and all modifications are made against the child VHD. The VHD file type of the parent VHD can be any of these three VHD types, including another differential VHD. Multiple child VHD files can form a chain of differences.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.