HRESULT 0xC03A001B (ERROR_VHD_INVALID_TYPE): meaning and diagnosis

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ERROR_VHD_INVALID_TYPE: the requested operation cannot be performed on a virtual disk of this type.

Could be also:
Constant	Type	OS
STATUS_VHD_INVALID_TYPE	NTSTATUS	Windows

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ERROR_VIRTUAL_DISK_LIMITATION	ERROR_VHD_INVALID_STATE

ERROR_VHD_INVALID_TYPE

ERROR_VHD_INVALID_TYPE means the requested operation is not valid for the current virtual disk type. Fixed, dynamic, differencing, and shared virtual disks support different operations.

What to check for ERROR_VHD_INVALID_TYPE

Inspect VhdType before selecting a conversion, merge, compact, or resize operation.
Use merge operations only for a valid offline differencing chain.
Do not expect compaction to apply to fixed virtual disks.

Get-VHD -Path "D:\VMs\disk.vhdx" | Select Path,VhdType,Size,FileSize

Microsoft: Get-VHD

Microsoft: Merge-VHD

Microsoft: Optimize-VHD

Diagnostic discriminator: Compare the requested virtual-disk operation with the actual VHD/VHDX type. The same disk may be healthy yet reject an operation that its fixed, dynamic, differencing or shared type does not support.

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