Исправление pfg, (текущая версия) :
в утилитах обслуживания фс виртуальной системы должна быть функция уменьшения размера образа носителя.
вот для виртуалбокса.
VBoxManage.exe modifymedium –compact
The –compact option can be used to compact disk images. Compacting removes blocks that only contains zeroes. Using this option will shrink a dynamically allocated image. It will reduce the physical size of the image without affecting the logical size of the virtual disk. Compaction works both for base images and for differencing images created as part of a snapshot.
For this operation to be effective, it is required that free space in the guest system first be zeroed out using a suitable software tool. For Windows guests, you can use the sdelete tool provided by Microsoft. Run sdelete -z in the guest to zero the free disk space, before compressing the virtual disk image. For Linux, use the zerofree utility which supports ext2/ext3 filesystems. For Mac OS X guests, use the diskutil secureErase freespace 0 / command from an elevated Terminal.
Please note that compacting is currently only available for VDI images. A similar effect can be achieved by zeroing out free blocks and then cloning the disk to any other dynamically allocated format. You can use this workaround until compacting is also supported for disk formats other than VDI.
Исходная версия pfg, :
в утилитах обслуживания фс виртуальной системы должна быть функция уменьшения размера образа носителя. ща для виртуалбокса вспомню