1Jan

Big Mean Folder Machine 2.37 Download

1 Jan 2000admin
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To be honest, I am surprised that I have not blogged about this before, but today I would like to talk about how virtual machine files are placed on the hard disk.

Virtual Machine files

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The first thing to know is what files are used to create a virtual machine:

  • .XML files
    • These files contain the virtual machine configuration details. There is one of these for each virtual machine and each snapshot of a virtual machine. They are always named with the GUID used to internally identify the virtual machine or snapshot in question.
  • .BIN files
    • This file contains the memory of a virtual machine or snapshot that is in a saved state.
  • .VSV files
    • This file contains the saved state from the devices associated with the virtual machine.
  • .VHD files
    • These are the virtual hard disk files for the virtual machine
  • .AVHD files
    • These are the differencing disk files used for virtual machine snapshots

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Understanding data roots

Hyper-V has a concept of the “virtual machine data root” and the “virtual machine snapshot root”. These are the locations where the virtual machine configuration (.XML) and saved state (.BIN & .VSV) files are stored. For example – a virtual machine which had a virtual machine data root of “D:Foo” and a snapshot data root of “D:Foo” and had two snapshots would have a file structure like this:

D:Foo
D:FooSnapshots
D:FooSnapshots[Snapshot #1 GUID directory]
D:FooSnapshots[Snapshot #1 GUID].XML
D:FooSnapshots[Snapshot #2 GUID directory]
D:FooSnapshots[Snapshot #2 GUID].XML
D:FooVirtual Machines
D:FooVirtual Machines[Virtual Machine GUID directory]
D:FooVirtual Machines[Virtual Machine GUID].XML

If the snapshots and the virtual machine had saved states associated with them – then the file structure would look like this:

D:Foo
D:FooSnapshots
D:FooSnapshots[Snapshot #1 GUID directory]
D:FooSnapshots[Snapshot #1 GUID directory][Snapshot #1 GUID].BIN
D:FooSnapshots[Snapshot #1 GUID directory][Snapshot #1 GUID].VSV
D:FooSnapshots[Snapshot #1 GUID].XML
D:FooSnapshots[Snapshot #2 GUID directory]
D:FooSnapshots[Snapshot #2 GUID directory][Snapshot #1 GUID].BIN
D:FooSnapshots[Snapshot #2 GUID directory][Snapshot #1 GUID].VSV
D:FooSnapshots[Snapshot #2 GUID].XML
D:FooVirtual Machines
D:FooVirtual Machines[Virtual Machine GUID directory]
D:FooVirtual Machines[Virtual Machine GUID directory][Virtual Machine GUID].BIN
D:FooVirtual Machines[Virtual Machine GUID directory][Virtual Machine GUID].VSV
D:FooVirtual Machines[Virtual Machine GUID].XML

Some key things to highlight about data roots:

  • We always create a “Virtual Machines” folder under the virtual machine data root and store the virtual machine configuration files there.
  • We always create a “Snapshots” folder under the snapshot data rot and store the snapshot configuration files there.
  • We fully support multiple virtual machines having the same virtual machine and snapshot data root

Understanding VHD and AVHD locations

.VHD files can be created pretty much anywhere you want. In Windows Server 2008 R2, .AVHD files are always created in the same location as their parent .VHD files.

Common Virtual Machine File Configuration #1 – Default Virtual Machine Data Root

A virtual machine with a default virtual machine data root is one where you created the virtual machine and accepted the default options in the new virtual machine wizard, specifically where you did not check to “Store the virtual machine in a different location” on the first page of the new virtual machine wizard:

In this configuration option the virtual machine data root and snapshot data root will be set to the path specified under the Hyper-V Settings in the “Virtual Machines” setting, and the virtual hard disk will be created under the path specified under the Hyper-V Settings in the “Virtual Hard Disks” setting:

These paths are normally set to “C:ProgramDataMicrosoftWindowsHyper-V” for the “Virtual Machines” setting and “C:UsersPublicDocumentsHyper-VVirtual Hard Disks” for the “Virtual Hard Disks” setting. That said – I usually change these settings to “D:Hyper-VConfiguration Files” and “D:Hyper-VVirtual Hard Disks” on my systems as I find this easier to work with.

Common Virtual Machine File Configuration #2 – External Virtual Machine Data Root

If you do select to “Store the virtual machine in a different location” you will get what we call a virtual machine with an external virtual machine data root.

With this option we create a new folder named after the virtual machine, and set the virtual machine data root and snapshot data root to this folder. We also default to creating the virtual hard disk in this new folder.

Common Virtual Machine File Configuration #3 – Exported / Imported virtual machine

If you export a virtual machine a virtual machine and then import it without checking the option to “Duplicate all files so the same virtual machine can be imported again”, you will end up with a virtual machine that looks like a virtual machine with an external data root – but there will be one difference.

Instead of having the virtual hard disks stored in the same location as the virtual machine data root – they will be stored in a “Virtual Hard Disks” folder under the virtual machine data root folder instead.

Changing a virtual machine to a default data root virtual machine

If you have an existing virtual machine that you want to change to a “default data root” configuration – the easiest way to do this is to export the virtual machine and then import it and check the option to “Duplicate all files so the same virtual machine can be imported again”. The resulting virtual machine will be a default data root virtual machine.

Changing a virtual machine to an external data root virtual machine

If you have an existing virtual machine that you want to change to an “external data root” configuration, you have two options:

  • Spend some time scripting the import / export APIs in Hyper-V. It is possible to do it this way – but it is not easy.
  • Move the virtual machine using System Center Virtual Machine Manager. SCVMM will always transform a virtual machine into an external data root virtual machine in the process of moving it.

Changing the snapshot data root for a virtual machine

The only way to change the virtual machine data root for a virtual machine is by using import / export. But the snapshot data root for a virtual machine can be changed at any time – as long as all snapshots are deleted first. If you have deleted all existing snapshots you can change the snapshot data root by changing the “Snapshot File Location” setting for the virtual machine under the virtual machine settings user interface.

And that is pretty much all there is to know about where virtual machine files are stored today :-)

Cheers,
Ben

An archive is a file containing one or more files along with their data. You use archives in Windows 10 to copy multiple files into a single file for easier portability and storage, or simply to compress files to use less storage space.

Archives are also useful when you want to send multiple files to someone by email. Instead of attaching several large files, archive them into one file. That file takes less space than sending all the files separately, and it’s easier to attach and send by email.

The most popular format for archiving files is .zip and Windows 10 can automatically work with this type of archive without having to install third-party apps. To archive several files and folders into a .zip file, open File Explorer and follow these steps:

  1. Select the files and folders that you want to archive.

  2. Click the Share tab on the Ribbon.

    The Share tab is displayed.

  3. In the Send section, click the Zip button.

    An archive is automatically created in the same folder as the files and folders that you selected. You can edit the name of the archive.

  4. Type the name that you want for the archive file.

  5. Press Enter or click somewhere else in the File Explorer window.

    You can now use the newly created .zip archive and send it by email or store it where you want on your computer.

Big Mean Folder Machine 2.37 Download

If you want to save space on your hard disk, it’s a good idea to delete the files and folders that you placed in an archive, as you can always extract them from the archive.