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Virtual Disk

The wizard will create a persistent virtual disk. A new operating system can be installed onto the virtual disk file without the need to repartition a physical disk or even reboot the host system. The maximum virtual disk size is currently limited to 2 gigabytes (GB). A smaller virtual disk size can be specified in this panel. The virtual disk will initially be only a few kilobytes in size and will grow dynamically up to the size specified. This occurs transparently to the guest operating system, which will always believe that the virtual disk size is actually the full size specified.

You cannot change the virtual disk size once a virtual disk has been created. The actual maximum space available to the guest operating system inside the virtual disk may be very slightly smaller than the amount specified.

Once the configuration wizard is finished, the configuration editor can be used to change the disk mode to undoable or nonpersistent

A virtual disk is a file on the host file system which contains all data stored in the virtual IDE drive visible to the guest operating system. A virtual disk can be created on any type of disk (IDE, SCSI, etc.) and any type of filesystem (E2FS, FAT, FAT32, NTFS, etc.) supported by the host operating system. The virtual disk can also be created on a removable disk drive or placed on a network file server. The configuration wizard will place the virtual disk in the virtual machine directory specified earlier. The location can be changed by clicking the Back button and returning to the Virtual Machine Directory panel.