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Title
Hyper-V agentless disk space shown as fully used or higher than what is seen in guest operating system -
Description
Hyper-V agentless disk space shown as fully used or higher than what is seen in guest operating system -
Cause
The disk information shown in RapidRecovery is not directly related to the filesystem in guest operating system.
The used space is actually showing the disk size that is allocated from vhdx layer.
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Resolution
For "Fixed size virtual hard disk“, it is always shown as full, because it's fully allocated upon creation.
For "Dynamically expanding virtual hard disk", it depends on the disk space being allocated.
A good way to check is check Hyper-V VM settings for Hard Drive, and click on "Inspect". The used space will be roughly correspond to the "Current File Size"