HRESULT 0x80042439 (VDS_E_PARTITION_OF_UNKNOWN

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Description:

Cannot read partition information.

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VDS_E_ACTIVE_PARTITION	VDS_E_LEGACY_VOLUME_FORMAT

VDS_E_PARTITION_OF_UNKNOWN_TYPE

VDS_E_PARTITION_OF_UNKNOWN_TYPE means the selected disk contains a partition type that the provider cannot interpret for the requested operation. It can represent vendor, recovery, foreign-OS, or damaged metadata.

What to check

Inspect the partition style and partition type before modifying the disk.
Do not delete an unknown partition until its purpose is understood; it may be an OEM, recovery, or boot-related partition.
If the type unexpectedly changed, treat it as possible metadata corruption and preserve the disk state for recovery.

Virtual Disk Service is a legacy COM API. On Windows 8 and Windows Server 2012 and later, inspect and manage supported storage through the Storage Management API and the Storage PowerShell cmdlets.

Microsoft: Get-Partition

Microsoft: Get-Disk

Microsoft: VDS error codes

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