What does HRESULT 0xC0380047 (ERROR_VOLMGR_VOLUME_LENGTH_INVALID) mean?

ERROR_VOLMGR_VOLUME_LENGTH_INVALID

Read the code at the owning storage layer: volmgr volume length invalid

ERROR_VOLMGR_VOLUME_LENGTH_INVALID has unsigned value 0xC0380047. In the volmgr layer, it rejects a specific contract because the requested logical length is incompatible with the supplied extents or volume layout type while diagnosing this result. Diagnosis of it should follow logical volume geometry and the disk extents that realize it through one controlled state transition.

Dynamic volumes are represented as packs containing disks and volumes; each volume has one or more plexes, and each plex is assembled from members and extents while diagnosing this result. Indices and counts are relative to the submitted layout generation, while configuration logs are replicated across participating dynamic disks while diagnosing it. This object model determines which identifiers, counts and ownership state are meaningful.

Diagnosis of this result should begin with the object model and generation current at the failure. A later successful enumeration may describe a replacement object and cannot retroactively validate the rejected request.

Build a trustworthy incident record

When it is followed by a secondary cleanup failure, store both codes with timestamps and retain this one as the initiating result.

Controlled comparison

1. Capture the API parameters and object map that led to this result; do not begin with cleanup.
2. Build a passing control with the same disks or image copy and preserve volume ID, requested length, sector sizes, extent table, plex/member counts, disk health and the exact VM_VOLUME_LAYOUT buffer for this HRESULT.
3. Run the narrow transition described here: serialize the exact VM_VOLUME_LAYOUT buffer, validate every count and Size field, and compare it with a layout produced by a known-good management API.
4. Compare resulting IDs, counts, health and ownership to prove the caller crossed the result invariant rather than suppressing it.

Compare traces for ERROR_VOLMGR_VOLUME_LENGTH_NOT_SECTOR_SIZE_MULTIPLE and it. The latter page covers a nearby storage boundary, whereas it rejects the requested logical length is incompatible with the supplied extents or volume layout type. A correct caller should be able to reproduce each case independently.

Mechanism-specific note

Validate logical length against the sum and mapping of supplied extents, not only against free space. For striped or mirrored layouts, the relationship is not a simple sum while diagnosing it. Save the requested length and a normalized interval map so overlaps, gaps and arithmetic overflow can be reviewed independently of the live disks.

Completion criteria

Rebuild the layout from enumerated objects and checked arithmetic rather than patching one serialized field; validate counts, indices, sizes, alignment and overflow before submission for this HRESULT. The result repair is incomplete until a fresh enumeration and new handle observe the corrected state.

• the first retry uses newly enumerated identifiers rather than cached handles.
• The durable metadata or provider state agrees with the success returned after it.
• A second run after close/reopen does not recreate the rejected the condition.
• the nearby ERROR_VOLMGR_VOLUME_LENGTH_NOT_SECTOR_SIZE_MULTIPLE path remains separately testable and separately logged.

Before responding to it with destructive cleanup, prove which object owns the failure for this HRESULT. Changing every disk or provider at once prevents a meaningful regression test for this HRESULT.

Technical references

• Microsoft: COM error codes for VOLMGR, VHD and SDIAG — documents the supported management path relevant to it.
• Microsoft: Virtual Disk Service object model — defines the volmgr objects used to interpret it.
• Microsoft: Pack object — primary API or object-model reference for the boundary.
• Microsoft: Virtual Disk Service common return codes — use this source to verify volmgr state and parameters for this HRESULT.

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