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  • Difference between Virtual Hard Disk and Hard Disk

    Virtual Hard Disk vs Hard Disk

    Hard Disk is a hardware device which stores data on the magnetic disk where as Virtual Hard Disk (VHD) is a disk image file format for storing the complete contents of a hard drive. The format was created by Connectix for Connectix Virtual PC product, which is now acquired by Microsoft in 2003 and it is now known as Microsoft Virtual PC.

    Below are more Difference between Virtual Hard Disk and Hard Disk.

    Difference between Virtual Hard Disk and Hard Disk

    Virtual Hard Disk

    • Virtual hard disk (VHD) is a disk image file format for storing the complete contents of a hard drive.
    • Because it is a disk image file format of the whole content of hard drive it is called as Virtual Hard Disk.
    • As it is a disk image which includes all the data and structural elements. It can be stored on any physical host.
    • It can be accessed from anywhere.
    • There are two main types of virtual hard disks: fixed-size virtual hard disk and dynamically expanding virtual hard disk.
    • The fixed-size VHDs will take a specific amount of physical disk space on the host computer’s file system.
    • The dynamic virtual hard disk keeps expanding as more and more space is needed.

    Hard Disk

    • Hard Disk is a hardware device which is connected to the PC or Laptop or Notebook or gaming consoles like Xbox and Playstation.
    • It needs to be installed on a particular hardware and is connected to it.
    • It is stored on a particular physical host and can be accessed from within or from anywhere provided it is shared on the network.
    • Hard Disks come in different sizes from GB to TB and also with different speeds RPM’s.
    • Hard Disk comes in fixed size it cannot grown like Virtual Hard Disk.

    Virtual Hard Disk Advantages

    Significant benefits result from the ability to boot a physical computer from a virtual hard drive:

    • Ease of deployment: IT organizations can deploy standardized, ‘pre-built’ configurations on a single VHD. As an example, software engineering organizations which need a specific set of tools for a particular project could simply ‘pull’ the appropriately-configured VHD from a network location.
    • Backup-and-Restore: Changes to the contents of a VHD (such as infection by a virus, or accidental deletion of critical files) are easily undone.
    • Multi-User Isolation: Many current operating systems support having multiple users, but offer varying degrees of protection between them (e.g., one user of the OS could become infected by a virus which infects other users, or make changes to the OS which affect other users). By giving each user their own version of the operating system—say, by creating for each of them a differencing VHD based on a base installation of the OS—changes to any particular child image would have no effect on any of the other child images.

    These are the few differences between Virtual Hard Disk and Hard Disk.

    Posted under: Computers
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