What does HRESULT 0x80042804 (VDS_E_INCORRECT_BOOT_VOLUME_EXTENT_INFO) mean?

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Description:

VDS received multiple disk extents while resolving the current boot volume topology.

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VDS_E_UNABLE_TO_FIND_BOOT_DISK	VDS_E_GET_SAN_POLICY

VDS_E_INCORRECT_BOOT_VOLUME_EXTENT_INFO

This HRESULT is not a generic “bad partition table” code. The VDS catalog says multiple disk extents were reported for the boot volume where the boot-volume discovery path expected a different topology. A volume extent describes a byte range on a disk; a volume that spans disks or has unexpected extent reporting can therefore break code that is trying to associate the current boot volume with one disk role.

Why this state matters

The diagnostic target is the extent map returned for the boot volume and the VDS disk-role flags. Do not repair the MBR or GPT merely because the word extent appears in the message. First verify whether the volume is actually multi-extent, whether storage virtualization is presenting an unusual mapping, or whether the VDS/provider view is stale.

Diagnostic focus

Capture the complete volume extent list, including disk IDs, starting offsets, and extent lengths.
Identify which disk carries VDS_DF_BOOT_DISK and compare that role with the reported extent map.
Refresh or reenumerate VDS after storage topology changes before concluding that on-disk metadata is damaged.
Distinguish this system-discovery failure from VDS_E_VOLUME_SPANS_DISKS, which is an explicit operation precondition for a general volume.

Technical references

VDS_DISK_FLAG · VDS_DISK_PROP · IVdsService::Refresh · IVdsService::Reenumerate · MS-VDS error codes

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