Compacting Parallels Virtual Hard Disk Files

Discussion in 'Parallels Desktop for Mac' started by monoclast, Jun 27, 2006.

  1. monoclast

    monoclast

    Messages:
    24
    Can someone explain to me how Parallels calculates virtual hard disk sizes displayed in VM Properties?

    • When I initially created this VM, I created a 10 GB expandable virtual disk image to run the host operating system (Fedora Core 5 Linux).
    • The Mac OS X Finder reports that the disk image HDD file is 7.42 GB in size.
    • The host operating system (FC5 Linux) reports that 6.8 GB is actually in use on the disk.
    • Yet Parallels, under the VM Properties > Hard Disk > Advanced panel, under the Optimization heading, says:

    Actual size of disk image file is 3497 MB. Click Compact to reduce the size of the hard disk image file.​

    This makes no sense to me. How does Parallels arrive at the number 3497?

    Also, when I click the Compact button, a progress dialog is displayed for quite some time, indicating that some sort of progress must be happening, but after which the size of the file is unchanged.

    I even went so far as to run ImageTool and Defragment expanding virtual hard disk before compacting - same results! The HDD file size is unchanged.
     
  2. johnb

    johnb

    Messages:
    33
    i've wondered the same thing. as well as how to expand the virtual hard disk if i need to. apparently merely changing it's size is not sufficient.....
     

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