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

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Section 3.4.5.2.18.5: The Windows implementation requires the stripe size to be 65536 if thetype is VDS_VT_STRIPE or VDS_VT_PARITY. Other volume types are not striped and the stripe sizeis 0. Section 3.4.5.2.18.6: If a GPT disk is added to a basic pack, the operation automaticallycreates an MSR partition on the disk, except when the server is running in Windows PE because anadministrator may want to create an EFI system partition on the disk. The EFI system partition, ifpresent, must be the first partition on the disk. If a disk is added to a dynamic pack, the operationdoes not create an MSR partition. Section 3.4.5.2.18.7: It is not possible to migrate a basic disk from one basic disk pack toanother basic disk pack. A dynamic disk with volumes cannot be converted to a basic disk. Section 3.4.5.2.18.7: If the server is running on Windows Server 2003 or WindowsServer 2003 R2:•If this method is called to convert a basic disk to a dynamic disk, and there is not enough spaceon the disk to create the dynamic disk metadata database, then this method MUST returnVDS_E_NO_FREE_SPACE.•If this method is called to import a set of foreign dynamic disks into the online pack, and thedisks do not all belong to the same foreign pack, then this method MUST returnVDS_E_IMPORT_SET_INCOMPLETE.•If this method is called to convert a basic disk to a dynamic disk, and the disk contains an activepartition that is not the current active partition, then this method MUST returnVDS_E_ACTIVE_PARTITION.•If this method is called to convert a basic disk to a dynamic disk, and the disk contains a partitionwhich is of a type not recognized by the Windows operating system, then this method MUSTreturn VDS_E_PARTITION_OF_UNKNOWN_TYPE.•If this method is called to convert a basic disk to a dynamic disk, and the disk contains a partitionwhich is part of an FtDisk volume, then this method MUST returnVDS_E_LEGACY_VOLUME_FORMAT.•If this method is called to convert a basic disk to a dynamic disk, then the disk contains apartition which is either of unknown type, or, which has a type indicating that it is a known OEMpartition, and the aforementioned partition is both preceded and followed by data partitions withrecognized partition types, method MUST return VDS_E_NON_CONTIGUOUS_DATA_PARTITIONS. Section 3.4.5.2.18.8: On Windows Server 2003 and Windows Server 2003 R2, removing amissing disk called against a dynamic disk does two things:1. Removes the disk from the online disk group.2. Reverts the disk to basic.If the missing disk is in the online disk group and is being converted to basic, both steps arecompleted. If a missing disk is being removed from the disk group, only step 1 is performed. If thedisk is foreign, only step 2 is performed because the disk is not in the online disk group. Section 3.4.5.2.19.1: This array's size is 32 objects or less, because Windows imposes a limitof 32 disks that can be used with a single volume. Section 3.4.5.2.19.1: The stripe size is 65,536 if type is VDS_VT_STRIPE or VDS_VT_PARITY;otherwise, stripe size is 0.[MS-VDS] — v20110610Virtual Disk Service (VDS) Protocol SpecificationCopyright © 2011 Microsoft Corporation.Release: Friday, June 10, 2011344 / 360
Section 3.4.5.2.19.1: In Windows, if zero is specified, the server determines the alignmentvalue that is specified in one of the following registry keys underHKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\vds\Alignment, depending on the sizeof the disk on which the volume is created. The following default values appear after the operatingsystem is installed and may be overridden by an administrator.Value"Disk Size 4GB"65536"Disk Size 4 - 8GB"1048576"Disk Size 8 - 32GB"1048576"Disk Size > 32GB"1048576MeaningRegistry Key: LessThan4GBRegistry Key: Between4_8GBRegistry Key: Between8_32GBRegistry Key: GreaterThan32GB Section 3.4.5.2.20.5: For Windows Vista, Windows Server 2008, Windows 7, and WindowsServer 2008 R2, if the disk is not convertible, because there are data partitions or volumes on thedisk, or, because the disk is removable, VDS_E_DISK_NOT_CONVERTIBLE is returned. Windows 7and Windows Server 2008 R2 require that the disk have a minimum size of 128MB in order for thedisk to be converted from the MBR disk partition formatting style to the GPT disk partitionformatting style. If the disk meets all other requirements for conversion, and if the disk's size is lessthan this minimum, the error returned will be VDS_E_DISK_NOT_CONVERTIBLE_SIZE. Section 3.4.5.2.20.6: Implemented for Windows Vista SP1, Windows Server 2008,Windows 7, and Windows Server 2008 R2. Section 3.4.5.2.20.7: Implemented for Windows Vista SP1, Windows Server 2008,Windows 7, and Windows Server 2008 R2. Section 3.4.5.2.21.1: This method will fail on Windows Server 2008 if called against a basicdisk or dynamic disk, and will only succeed if the disk has no disk partitioning format. This methodwas added for Windows Vista, but was superseded by the IVdsDiskOnline::Online method inWindows Server 2008. Section 3.4.5.2.21.1: For Windows Server 2008, if this method is called to either online oroffline the disk and the disk is already online or offline, the method returns S_OK orERROR_SUCCESS (0x00000000). In Windows Server 2008 R2, if this method is called to eitheronline or offline the disk and the disk is found to already be online or offline, the method returnsVDS_E_DISK_NOT_ONLINE (0x8004244B) or VDS_E_DISK_NOT_OFFLINE (0x80042595),respectively. Section 3.4.5.2.23.3: On Windows Vista and Windows Server 2008, the offset supplied to thismethod may be rounded up or down to an alignment boundary. Section 3.4.5.2.23.4: OEM partitions, EFI system partitions, and MSR partitions areconsidered protected and cannot be deleted unless bForceProtected is specified. Section 3.4.5.2.23.5: Due to a flaw in the Windows code base, the partition size is returned. Section 3.4.5.2.23.9: On Windows 7 and Windows Server 2008 R2, if the method call is madeusing FAT, FAT32, or ExFAT file system, and the bEnableCompression parameter is TRUE,VDS_E_COMPRESSION_NOT_SUPPORTED will be returned in the return value of this method call.[MS-VDS] — v20110610Virtual Disk Service (VDS) Protocol SpecificationCopyright © 2011 Microsoft Corporation.Release: Friday, June 10, 2011345 / 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
Page 294 and 295: 6 Appendix A: Full IDLFor ease of i
Page 296 and 297: VDSBusTypeiScsi = 0x00000009,VDSBus
Page 298 and 299: } 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
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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 346 and 347: On Windows Server 2003, Windows Ser
Page 348 and 349: incorrectly returns 0 in the pulPer
Page 350 and 351: Section 3.4.5.2.38.3: Windows does
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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[MS-VDS]: Virtual Disk Service (VDS) Protocol Specification

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