What does HRESULT 0x80042543 (VDS_E_GPT_ATTRIBUTES_INVALID) mean?

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Description:

The requested GPT attribute mask contains a combination VDS does not accept for the partition operation.

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VDS_E_FAULT_TOLERANT_DISKS_NOT_SUPPORTED	VDS_E_MEMBER_IS_HEALTHY

VDS_E_GPT_ATTRIBUTES_INVALID

GPT partition attributes are a 64-bit field associated with a GPT partition entry. VDS exposes them through VDS_PARTITION_INFO_GPT and changes selected attributes through IVdsAdvancedDisk::ChangeAttributes. This HRESULT means the attribute request itself failed validation; it is not evidence that the GPT header CRC is corrupt.

Why this state matters

Log the complete attribute mask in hexadecimal and the partition type GUID. Some attribute bits are platform-defined while others are partition-type-specific, so interpreting a bit without its type GUID is unsafe. Compare the requested state with the current attributes before retrying and avoid replacing the whole mask from a hard-coded constant when only one supported attribute needs to change.

Diagnostic focus

Capture the full 64-bit GPT attribute value and partition type GUID.
Requery the current VDS_PARTITION_INFO_GPT.attributes field before applying another change.
Check whether the caller combined platform-required, hidden, read-only, or no-drive-letter semantics incorrectly.
Do not diagnose GPT header damage solely from this validation HRESULT.

Technical references

VDS_PARTITION_INFO_GPT · IVdsAdvancedDisk::ChangeAttributes · CHANGE_ATTRIBUTES_PARAMETERS · PARTITION_INFORMATION_GPT · UEFI GPT disk layout

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