virtualbox increase disk size not reported in windows

If you expand a virtual disk volume size, the virtual size will increase but on a dynamically allocated volume the actual size will not.Īfter expanding a disk size, it is necessary to expand the filesystem inside the guest OS as well. In short, the actual size is a lot smaller since all the empty blocks didn't have to be written to the host, and VirtualBox knows to return a block with zeroes when being read by the guest in an unwritten area of the virtual volume.

This can be advantageous if you want to have your virtual disks take up the full allocatable space on the host or for performance reasons, but otherwise dynamic allocation should be left enabled as it's pretty convenient.īy using dynamic allocation, VirtualBox skips writing out all the zeroed blocks to the host and instead stores that information as part of the virtual disk file format in a few bytes. You want to use a fixed size virtual disk. If you want to have the actual size match the virtual size, you need to turn off dynamically allocated.

Virtual Size is the size of the virtual volume as seen by the guest.Īctual Size is the size of the virtual volume as seen by the host. Please contact the moderators of this subreddit if you have any questions or concerns. I am a bot, and this action was performed automatically. Thanks for taking the time to help us help you! Also, PLEASE remember to change the flair of your post to Solved after you have been helped! Your post has not been deleted - do not re-submit it. If you have met these requirements, you can ignore this comment. If this is your first time creating a virtual machine, we have a guide on our wiki that covers the important steps. Please also check our FAQ and if you find your question is answered there, PLEASE remove your post or at least change the flair to Solved. Please check Google and the VirtualBox Manual before asking simple questions. PLUS a detailed description of the problem, what research you have done, and the steps you have taken to fix it. Whether you have installed Guest Additions and/or Host Extensions (this solves 90% of the problems we see) Whether you have enabled VT-x/AMD-V (applicable to all hosts running 6.1 and above) and disabled HyperV (applicable to Windows 10 Hosts)

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Virtualbox increase disk size not reported in windows