Ticket #11175 (closed task: fixed)
Add documentation for zeroing Mac OS X guests before using the 'modifyhd --compact' operation
|Reported by:||socratis||Owned by:|
|Version:||VirtualBox 4.2.4||Keywords:||user manual|
|Cc:||Guest type:||OSX Server|
In page 135 of the latest manual (4.2.4, as of this filing) it mentions the steps to zero out the free space for Windows guests (sdelete -z) and Linux guests (zerofree), but not for Mac OS X guests. An addition something like the following (in bold) would be helpful:
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. Execute 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, you can use the "Erase Free Space..." option in the built-in "Disk Utility" tool provided by Apple.
Not a technical writer, neither a native English speaker here, so feel free to adjust the wording at will ;)