Tech/VirtualBox.md
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## Windows Guest
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- defrag
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-- `sdelete.exe c: -z`
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+- get [sdelete from SysInternals](https://learn.microsoft.com/en-us/sysinternals/downloads/sdelete)
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+- `sdelete64.exe -z c:`
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## Host
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- `vboxmanage modifymedium disk some-disk001.vdi --compact`
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