User`s guide

Using Parallels Add-Ons 194
Guest Operating System Requirements
Parallels Compressor supports the following guest operating systems:
32-bit operating systems:
 Windows 2000 Server SP4, Professional SP4
 Windows XP Professional SP2, SP3, Home SP2, SP3
 Windows Server 2003 Web, Standard, Enterprise, Datacenter SP2, R2
 Windows Vista Home, Business, Ultimate, Enterprise SP0, SP1
 Windows 2008
64-bit operating systems:
 Windows XP Professional SP2
 Windows Server 2003 Web, Standard, Enterprise, Datacenter SP2, R2
 Windows Vista Home, Business, Ultimate, Enterprise SP0, SP1
 Windows 2008
Parallels Compressor Working Principles
Compressor processes a virtual machine in the following way:
 defragments virtual disks and cleans up unused space
 compacts virtual disks
The actions performed on your particular virtual machine depend upon the running mode:
 in automatic mode Parallels Compressor compresses only the current system disk
performing the pre-defined set of actions
 in manual mode you are able to choose disks to compress and actions to perform
More about running modes and other Compressor properties can be found in Parallels
Compressor Help.
Steps of the Compression Procedure
Parallels Compressor is designed to perform the most efficient compression of a virtual
machine. The procedure consists of two steps:
 a preparatory step performed in the guest operating system (deleting temporary and
unnecessary files, defragmenting virtual disks and cleaning unused disk space);
 a compacting step (reducing the size of the virtual disk files) performed in the primary
operating system.