WT_Disk class

Describes an iSCSI virtual disk.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties.

Syntax

class WT_Disk
{
  uint32               WTD;
  sint32               Type;
  sint32               Flags;
  sint32               Status;
  string               Description;
  string               DevicePath;
  string               ActiveDevicePath;
  string               ParentPath;
  uint32               ParentWTD;
  uint32               Size;
  uint32               AllocatedSize;
  string               SerialNumber;
  sint32               DVMountStatus;
  datetime             DVTimeStamp;
  string               DVDeviceId;
  datetime             AsyncOpStartTime;
  datetime             AsyncOpEndTime;
  string               ResourceGroup;
  boolean              Enabled;
  string               Guid;
  string               DeviceVolumeGuid;
  WT_VDSLunInformation VdsLunInfo;
  string               LMSnapshotId;
  uint32               InternalCode;
  uint64               BlockSize;
  boolean              IsBasedOnUnderlyingRedundancy;
};

Members

The WT_Disk class has these types of members:

• Methods
• Properties

Methods

The WT_Disk class has these methods.

Method	Description
CancelAsyncOperation	Windows Server 2012: This method is not supported until Windows Server 2012 R2. Cancel any asynchronous operation on this disk.
CreateRamWTDisk	Windows Server 2012: This method is not supported until Windows Server 2012 R2. Create a new RAM-based iSCSI virtual disk.
CreateVhdWTDisk	Windows Server 2012: This method is not supported until Windows Server 2012 R2. Create a new VHDX-based iSCSI virtual disk.
Extend	Windows Server 2012 R2: This method is deprecated. Use the Resize method instead. Extends a virtual disk.
GetAsyncOperationProgress	Windows Server 2012: This method is not supported until Windows Server 2012 R2. Get the asynchronous operation progress information for this iSCSI virtual disk.
GetDVMountPoints	Windows Server 2012 R2: This method is deprecated. Returns a list of all mount points that belong to the virtual disk. This is used for locally mounted shadow copies.
GetRollbackProgress	Windows Server 2012 R2: This method is deprecated. Use GetAsyncOperationProgress instead. Retrieves the rollback progress information for the disk.
ImportWTDisk	Windows Server 2012: This method is not supported until Windows Server 2012 R2. Import an existing VHD or SCSI device as a iSCSI virtual disk.
NewDiffWTDisk	Windows Server 2012 R2: This method is deprecated. Use the CreateRamWTDisk, CreateVhdWTDisk, or ImportWTDisk methods instead. Creates a new differencing virtual disk.
NewWTDisk	Windows Server 2012 R2: This method is deprecated. Use the CreateRamWTDisk, CreateVhdWTDisk, or ImportWTDisk methods instead. Creates a new virtual disk.
Resize	Windows Server 2012: This method is not supported until Windows Server 2012 R2. Resize iSCSI virtual disk.

Properties

The WT_Disk class has these properties.

ActiveDevicePath

Data type: string

Access type: Read-only

Full active device path to the VHD file on the Microsoft iSCSI Target Server.

For a pass-through device, this is a decorated active Win32 device path in the form "SCSI:<win32_device_path>". For other device types, this property always has the same value as the DevicePath property.

Windows Server 2012: This property is not supported until Windows Server 2012 R2.

AllocatedSize

Data type: uint32

Access type: Read-only

Allocated size of the virtual disk, in megabytes.

AsyncOpEndTime

Data type: datetime

Access type: Read-only

When an asynchronous operation ended, whether it ended successfully or not.

Windows Server 2012: This property is not supported until Windows Server 2012 R2.

AsyncOpStartTime

Data type: datetime

Access type: Read-only

When an asynchronous operation started.

Windows Server 2012: This property is not supported until Windows Server 2012 R2.

BlockSize

Data type: uint64

Access type: Read-only

Logical block or sector size of the virtual disk, in bytes.

Description

Data type: string

Access type: Read/write

A user-friendly description of the virtual disk.

DevicePath

Data type: string

Access type: Read-only

Full path to the VHD file on the Microsoft iSCSI Target Server.

DeviceVolumeGuid

Data type: string

Access type: Read-only

Identifier of the volume where the disk resides.

DVDeviceId

Data type: string

Access type: Read-only

Windows Server 2012 R2: This property is deprecated.

Reserved for system use.

DVMountStatus

Data type: sint32

Access type: Read-only

Qualifiers: Values (NotMounted, MountSnapshot), ValueMap (0, 1)

Windows Server 2012 R2: This property is deprecated.

The current data view mount status.

DVTimeStamp

Data type: datetime

Access type: Read-only

Windows Server 2012 R2: This property is deprecated.

If the value of DVMountStatus is MountSnapshot, DVTimeStamp contains the date and time when the snapshot was taken. Otherwise, DVTimeStamp is an empty string.

Enabled

Data type: boolean

Access type: Read/write

Indicates whether the disk is enabled.

Flags

Data type: sint32

Access type: Read-only

Flags that indicate characteristics of the disk. This property is a bitmask and may contain one of the following possible values.

ReadOnlyWTDisk (0x00000001)

The disk is a read-only disk.

Windows Server 2012: This property value is not supported before Windows Server 2012 R2.

ShadowWTDisk (0x00000002)

The disk is a shadow copy disk.

Guid

Data type: string

Access type: Read-only

Reserved for system use.

InternalCode

Data type: uint32

Access type: Read-only

Reserved for system use.

IsBasedOnUnderlyingRedundancy

Data type: boolean

Access type: Read-only

Indicates whether the device is based on the underlying storage redundancy.

LMSnapshotId

Data type: string

Access type: Read-only

If the disk contains a volume shadow copy that is locally mounted, this property contains the shadow copy identifier.

ParentPath

Data type: string

Access type: Read-only

Full path to the parent VHD file on the Microsoft iSCSI Target Server. The parent VHD is the base virtual disk file that the differencing VHD links to.

ParentWTD

Data type: uint32

Access type: Read-only

Parent iSCSI Disk Index.

ResourceGroup

Data type: string

Access type: Read-only

The name of the cluster group that this virtual disk belongs to. If the Microsoft iSCSI Target Server service is not running on a Microsoft Failover Cluster, this property is an empty string.

SerialNumber

Data type: string

Access type: Read-only

Serial number of the virtual disk.

Size

Data type: uint32

Access type: Read-only

Size of the virtual disk, in megabytes.

Status

Data type: sint32

Access type: Read-only

Qualifiers: Values (Not Connected, Connected, Reverting), ValueMap (0, 1, 2)

Status of the virtual disk.

Type

Data type: sint32

Access type: Read-only

VHD type.

Windows Server 2012: The following property values are not supported before Windows Server 2012 R2.

Fixed (2)

Dynamic (3)

Differencing (4)

ReadOnlySnapshot (30000)

WritableSnapshot (30001)

RamDisk (30002)

PassThrough (30003)

Windows Server 2012: The following property values are the only ones supported on Windows Server 2012.

Fixed (1)

Differencing (2)

VdsLunInfo

Data type: WT_VDSLunInformation

Access type: Read-only

LUN information for the disk, used by the Virtual Disk Service (VDS).

WTD

Data type: uint32

Access type: Read-only

Qualifiers: Key

An iSCSI disk identifier that uniquely identifies the virtual disk. This index is automatically assigned by Microsoft iSCSI Target Server during the creation process and cannot be changed.

Remarks

It is possible for one or more property values to return NULL intermittently due to transient issues. In this case, re-querying may return all property values correctly.

Requirements

Minimum supported client	None supported
Minimum supported server	Windows Server 2012
Namespace	Root\Wmi
MOF	WmiWtProvider.mof
DLL	WtWmiProv.dll