[MS-VDS]: Virtual Disk Service (VDS) Protocol Specification

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Section 3.4.5.2.38.3: Windows does not implement the IVdsVDisk::GetHostVolumemethod. Section 3.4.5.2.39.1: Windows uses a string in the Security Descriptor Definition Language(SDDL) format. Section 3.4.5.2.39.1: For the Microsoft virtual disk provider, this parameter must be 0 or 1.If the parameter is 1, the pStringSecurityDescriptor parameter MUST be NULL. Section 3.4.5.2.39.1: In Windows, TimeoutInMs is not used. Section 3.4.5.2.39.2: For the Microsoft provider, this must be 0. Section 3.4.5.2.39.3: For the Microsoft provider, this must be 0. Section 3.4.5.2.39.5: In Windows, once the merge operation completes, the given virtualdisk is still usable but, once the blocks in the differencing disk have been merged into its parent, thelist of changed blocks stored in the differencing disk are duplicates of the same blocks in the parent.It is for this reason that: (1) It is recommended that the given virtual disk be deleted because it isno longer necessary and continuing to use the given disk will waste space; by definition, adifferencing virtual disk should consist of only the set of blocks that differ from blocks in the parentvirtual disk. (2) If a merge operation fails to complete, then the given differencing disk and itschildren are still valid. (3) Because it is recommended that the given virtual disk be deleted, anydifferencing virtual disks using the given virtual disk as a parent will become invalid as a result ofdeleting the given virtual disk.Also note that once the merge operation has commenced, any other virtual disks using the givendisk's parent as a parent become invalid. These disks will fail all operations. The reason for this isthat any other virtual disks using the given virtual disk's parent as a parent may have change blocksthat conflict with blocks merged into the parent.To illustrate the above: Given diskA, its parent is diskB, diskB's parent is diskC, and diskX, whichalso uses diskC as its parent, then once a merge of diskB into diskC is started (some number ofblocks have been copied from diskB to diskC), diskX becomes invalid. Section 3.4.5.2.39.5: For the Microsoft virtual disk provider, the disk MUST have beenopened with a ReadWriteDepth at least equal to this value. Section 3.4.5.2.39.6: In Windows, the expand operation invalidates a virtual diskdifferencing chain. Section 3.4.7: Windows Virtual Disk Service Remote Protocol servers use the Plug and Playsubsystem to register with the operating system to receive notifications of changes to the storagedevice. Section 3.4.7: When the sequence in the behavior log entry shown here is executedrepeatedly in a program (say, 200 times) on Windows Server 2008, the client will occasionallyencounter the error "0x800706BE". This error mainly comes at AddDisk and sometimes on Wait.However, on the server, the following entry is recorded in the event log: "====Faulting applicationvds.exe, version 6.0.6001.18000, time stamp 0x479198cb, faulting module ntdll.dll, version6.0.6001.18000, time stamp 0x4791adec, exception code 0xc0000005, fault offset0x000000000001f7fa, process id 0xda4, application start time 0x01c967e37ddea470.====-QueryUnallocatedDisks- CreatePack- AddDisk- Clean- Wait (for clean to complete)"[MS-VDS] — v20110610Virtual Disk Service (VDS) Protocol SpecificationCopyright © 2011 Microsoft Corporation.Release: Friday, June 10, 2011350 / 360
8 Change TrackingThis section identifies changes that were made to the [MS-VDS] protocol document between theMay 2011 and June 2011 releases. Changes are classified as New, Major, Minor, Editorial, or Nochange.The revision class New means that a new document is being released.The revision class Major means that the technical content in the document was significantly revised.Major changes affect protocol interoperability or implementation. Examples of major changes are:•A document revision that incorporates changes to interoperability requirements or functionality.•An extensive rewrite, addition, or deletion of major portions of content.•The removal of a document from the documentation set.•Changes made for template compliance.The revision class Minor means that the meaning of the technical content was clarified. Minorchanges do not affect protocol interoperability or implementation. Examples of minor changes areupdates to clarify ambiguity at the sentence, paragraph, or table level.The revision class Editorial means that the language and formatting in the technical content waschanged. Editorial changes apply to grammatical, formatting, and style issues.The revision class No change means that no new technical or language changes were introduced.The technical content of the document is identical to the last released version, but minor editorialand formatting changes, as well as updates to the header and footer information, and to the revisionsummary, may have been made.Major and minor changes can be described further using the following change types:•New content added.•Content updated.•Content removed.•New product behavior note added.•Product behavior note updated.•Product behavior note removed.•New protocol syntax added.•Protocol syntax updated.•Protocol syntax removed.•New content added due to protocol revision.•Content updated due to protocol revision.•Content removed due to protocol revision.•New protocol syntax added due to protocol revision.[MS-VDS] — v20110610Virtual Disk Service (VDS) Protocol SpecificationCopyright © 2011 Microsoft Corporation.Release: Friday, June 10, 2011351 / 360
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Revision SummaryDateRevisionHistory
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Contents1 Introduction ............
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2.2.2.6.1 Enumerations ............
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3.1.12.2 IVdsDisk2 Interface ......
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3.4.5.2.6.2 IVdsServiceUninstallDis
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3.4.5.2.32.3 IVdsVolumeMF::AddAcces
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1 IntroductionThe Virtual Disk Serv
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volume managervolume plexThe follow
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virtual disk: A disk that does not
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Note There is a charge to download
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1.4 Relationship to Other Protocols
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Parameter Value ReferenceRPC interf
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2 MessagesThe following sections sp
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VDS_H_FAILING_REDUNDANCY: One or mo
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VDS_ASYNCOUT_CREATEPARTITION: Infor
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VDSStorageIdTypeVendorSpecific = 0x
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VDS_FSF_ALLOCATION_UNIT_8K = 0x0010
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VDS_DET_OEM: The extent belongs to
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VDS_ESOF_QUICK: Determines whether
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2.2.1.2.21 VDS_LUN_RESERVE_MODEThe
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VDS_VF_NOT_FORMATTABLE: If set, the
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ValueVDS_NF_DISK_ARRIVE0x00000008VD
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wcLetter: The drive letter that tri
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2.2.1.3.10 VDS_ASYNC_OUTPUTThe VDS_
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Value0x4000000000000000GPT_BASIC_DA
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m_bCommandQueueing: A Boolean value
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diskId: The VDS object ID of the di
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MbrPartInfo: Contains information f
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VDS_OT_DISK: The object is a disk.V
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typedef struct _VDS_DRIVE_LETTER_PR
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pSharedSecret: A pointer to an arra
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Corresponding HBA_PORTSTATE value:
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wwnNode: The node WWN for the HBA p
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2.2.2.6.2.2 VDS_ISCSI_INITIATOR_POR
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unsigned long ulFlags;unsigned long
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2.2.2.9.1 Structures2.2.2.9.1.1 VDS
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pwszAdaptorName: The null-terminate
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ValueRemovableMedia0x0000000BFixedM
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style: The value from the VDS_PARTI
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ulFlags: The combination of any val
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VDS_VPT_SPAN = 0x0000000B,VDS_VPT_S
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allocated as the backing store for
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VDS_VST_DETACH_PENDING: The virtual
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} DEPENDENT_DISK_FLAG;DEPENDENT_DIS
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VirtualDeviceType: A pointer to a V
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additional information about the re
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Return value/code0x80042423VDS_E_PR
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Return value/codeDescriptionVDS_E_P
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Return value/codeDescriptionwhen th
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Return value/code0x8004251BVDS_E_VO
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Return value/codeVDS_E_DISK_LAYOUT_
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Return value/code0x80042566VDS_E_IN
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Return value/code0x80042588VDS_E_VO
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Return value/codeVDS_E_ASSOCIATED_P
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Return value/code0x80042815VDS_E_VO
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Return value/code0x8004290AVDS_E_IS
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Return value/code0x80042924VDS_E_RA
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3 Protocol DetailsThe following sec
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ParameterRPC interface UUID forIVds
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Objects can be HBA ports, initiator
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3.1.5 Service Object InterfacesThis
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Methods in RPC Opnum OrderMethodGet
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Methods in RPC Opnum OrderMethodGet
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MethodGetPropertiesDescriptionRetri
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MethodDescriptionOpnum: 3SetImportT
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MethodQueryExtentsConvertStyleSetFl
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All methods MUST NOT throw exceptio
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All methods MUST NOT throw exceptio
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MethodDescriptionOpnum: 3FormatAddA
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3.1.13.7 IVdsVolumeOnline Interface
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MethodDescriptionOpnum: 6MergeExpan
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Virtual Disk Providers and Virtual
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For a VDS_DISK_EXTENT or VDS_DISK_F
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3.2.1.4 DisksIVdsAdvancedDisk::GetP
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pointer to the virtual disk object
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3.3.2 TimersNone.3.3.3 Initializati
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3.4.1.1 Service ObjectThe service o
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•If the disk is a removable drive
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When the client calls a method to r
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•If the signal state is TRUE and
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3.4.5.1.3 Adding Disk ObjectsThe se
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3.4.5.1.4 Removing Disk ObjectsThe
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whether a basic, dynamic, or unallo
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If S_FALSE is returned, the client
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•Set the list of objects in the n
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•Set the pHrResult output paramet
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When the server receives this messa
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wcFirstLetter: The first drive lett
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Result of requeryAction server MUST
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ulFlags: A value from the VDS_SERVI
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pDiskIdArray: A pointer to an array
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3.4.5.2.8.2 IVdsServiceIscsi::Query
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HRESULT GetProperties([out] VDS_HBA
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Return Values: The method MUST retu
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VirtualDeviceType: Pointer to a VIR
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HRESULT GetDiskFromVDisk([in] IVdsV
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3.4.5.2.18 IVdsPack Methods3.4.5.2.
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3.4.5.2.18.5 IVdsPack::CreateVolume
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The server MUST update the percenta
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•Return an HRESULT indicating fai
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•objectType member is the value V
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[out] IVdsPack** ppPack);ppPack: A
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Clients cannot change the partition
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ERROR_SUCCESS (0x00000000)When the
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HRESULT QueryPartitions([out, size_
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•For each callback object that is
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3.4.5.2.23.7 IVdsAdvancedDisk::Dele
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Note This method is not valid on CD
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•objectType member is VDS_NTT_VOL
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•ullOffset is the byte offset at
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eginning of the disk that ullOffset
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usFileSystemRevision: A 16-bit, bin
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HRESULT FormatPartitionEx2([in] ULO
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•Set the signal state in the asyn
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•Create a new async object implem
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If the volume resides on a basic di
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•Delete all volume plexes in the
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•For each callback object registe
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If the volume is associated with a
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The server MUST then perform the fo
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•Verify that plNumberOfAccessPath
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HRESULT Mount();This method has no
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HRESULT GetFileSystemTypeName([out,
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•Return an HRESULT indicating fai
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•Allocate a buffer to hold the vo
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•Verify that ullDesiredNumberOfRe
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•Verify that ppVolume is not NULL
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•Search all software providers fo
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ProviderSpecificFlags: Flags specif
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For example, to merge a differencin
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At any point in the preceding seque
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•objectType member is VDS_NTT_FIL
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•Volume member is a VDS_VOLUME_NO
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Figure 2: Client starting a VDS ses
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4.1.2 Ending SessionsThe following
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2. The server determines that the c
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Figure 8: Retrieving the properties
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8. When the format operation comple
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wprintf( L" Volume Id: %s\n", buffe
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6 Appendix A: Full IDLFor ease of i
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VDSBusTypeiScsi = 0x00000009,VDSBus
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} VDS_VOLUME_TYPE;typedef enum _VDS
Page 300 and 301: VDS_OBJECT_IDULONGLONG} VDS_PARTITI
Page 302 and 303: typedef struct _VDS_STORAGE_DEVICE_
Page 304 and 305: } GptPartInfo;[default];};} CREATE_
Page 306 and 307: VDS_PS_UNKNOWN = 0x00000000,VDS_PS_
Page 308 and 309: typedef struct _VDS_FILE_SYSTEM_TYP
Page 310 and 311: typedef struct _VDS_PACK_PROP{VDS_O
Page 312 and 313: OPEN_VIRTUAL_DISK_FLAG_NO_PARENTS =
Page 314 and 315: );[out] unsigned long *pcFetched[he
Page 316 and 317: HRESULT QueryFileSystemTypes([out,
Page 318 and 319: *pInitiatorSharedSecret,[in] VDS_OB
Page 320 and 321: }[]HRESULT CreatePack([out] IVdsPac
Page 322 and 323: HRESULT CreateVolume([in] VDS_VOLUM
Page 324 and 325: [object,uuid(8F4B2F5D-EC15-4357-992
Page 326 and 327: uuid(9882f547-cfc3-420b-9750-00dfbe
Page 328 and 329: );[helpstring("method QueryPlexes")
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Page 332 and 333: [object,uuid(4daa0135-e1d1-40f1-aaa
Page 334 and 335: 7 Appendix B: Product BehaviorThe i
Page 336 and 337: Supported operating system versionI
Page 338 and 339: •Dynamic disk volumes - The flag
Page 340 and 341: overwritten with "UDF". The first e
Page 342 and 343: Section 3.1.7.1: This interface is
Page 344 and 345: Section 3.4.5.2.18.5: The Windows i
Page 346 and 347: On Windows Server 2003, Windows Ser
Page 348 and 349: incorrectly returns 0 in the pulPer
Page 352 and 353: •Protocol syntax updated due to p
Page 354 and 355: IVdsVolumeMF (section 2.2.2.15 81,
Page 356 and 357: enumerations 70interface 130methods
Page 358 and 359: PVDS_REPARSE_POINT_PROP 81PVDS_VDIS
Page 360: VDS_SERVICE_NOTIFICATION structure
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