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VirtualBox and TimeMachine

August 10th, 2010 by Matteo and tagged

I am a huge fan of TimeMachine (the Mac OS X backup solution) and I like the approach of archiving whole files. The only drawback occurs if you have huge files (e.g., hard disk images for virtual machines) that are often modified.

Here a way to reduce the backup size of your VirtualBox hard disk images: simply create a snapshot of your machine. VirtualBox will then leave your hard disk image untouched and create a separate file with just the changes from the time of the snapshot.

Snapshot tab

When the snapshot becomes too large you can merge it and create a new one (by choosing delete snapshot the difference file will be merged with the hard disk image).

Merge snapshot

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