What does HRESULT 0xC0380030 (ERROR_VOLMGR_PACK_ID_INVALID) mean?

ERROR_VOLMGR_PACK_ID_INVALID

Read the code at the owning storage layer: volmgr pack id invalid

Windows returns ERROR_VOLMGR_PACK_ID_INVALID, value 0xC0380030, at the volmgr boundary. It means that the pack identifier cannot be resolved in the current volume-manager namespace. Preserve the exact handle and generation of dynamic-disk pack identity, quorum and replicated configuration log before any rescan changes the evidence.

Keep the first result attached to its request parameters and object instance. Cleanup failures or a later drive-letter change are secondary evidence, not replacements for the original failure.

Build a trustworthy incident record

A management layer handling this result should report later recovery errors separately, because they answer a different question from the failed storage operation.

Controlled comparison

1. Before changing state, freeze the failing generation and save pack GUID and name, online state, primary flag, disk inventory, configuration-log sequence numbers, quorum view and failing transaction ID.
2. Exercise this exact comparison: 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.
3. During the comparison, keep image bytes, unrelated disks, provider policy and cluster topology fixed.
4. After the test, record the next return value and the durable object state; crossing the boundary should expose a later result rather than silently retrying.

ERROR_VOLMGR_PACK_INVALID describes a nearby but different storage condition; this result indicates that the pack identifier cannot be resolved in the current volume-manager namespace.

Mechanism-specific note

The identifier must be resolved in the same enumeration generation and provider scope that will execute the operation. Store the stable GUID plus the pack generation. Drive letters, friendly names and array positions are unsuitable substitutes because they can change independently of the underlying dynamic-volume object.

Completion criteria

Repair the pack configuration through supported dynamic-disk management, preserving GUIDs and the newest valid log sequence; avoid sector-level edits to replicated metadata. After correcting it, reopen the pack, volume, tier, snapshot or virtual disk so no cached generation participates in the validation run.

• 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 condition.
• the nearby ERROR_VOLMGR_PACK_INVALID path remains separately testable and separately logged.

Technical references

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