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VDS_E_DMADMIN_SERVICE_CONNECTION_FAILED
VDS_E_DMADMIN_SERVICE_CONNECTION_FAILED This HRESULT is specifically about the provider-to-Logical Disk Manager administrative service connection. It is not a generic network-connectivity error and does not describe a connection to a SAN target, iSCSI portal, or remote VDS client. The failing boundary is inside the legacy Windows disk-management stack used by the VDS provider.
What the VDS state means
Because the provider cannot establish that administrative connection, object enumeration or state-changing operations that depend on Logical Disk Manager may be unavailable. The correct evidence is service/provider logging and the scope of affected dynamic-disk operations. Disk presence in Plug and Play does not prove that the LDM administrative path is healthy.
Diagnostic focus
- Confirm whether the error is limited to dynamic-disk/pack operations or also appears for unrelated provider types.
- Capture VDS and Logical Disk Manager events before restarting services; the first connection failure is usually more diagnostic than later retries.
- Distinguish this code from
VDS_E_DMADMIN_METHOD_CALL_FAILED: connection setup failed here, while the latter means an administrative method call itself failed. - Avoid treating an iSCSI login or SMB connectivity test as proof about this HRESULT; those exercise different protocols and service boundaries.
Technical references
VDS common return codes · MS-VDS error codes · IVdsProvider · IVdsPack
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