I--- Windows Xp Qcow2

: Some users have reported "Disk read error" when migrating an existing XP installation from Raw to Qcow2, though these are often solvable by adjusting the disk controller settings in the VM. Performance Tips for Virtualized XP

: The file only takes up as much space as is actually written to, rather than the full size of the virtual disk. i--- Windows Xp Qcow2