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Win32_DiskDrive class

The Win32_DiskDrive WMI class represents a physical disk drive as seen by a computer running the Windows operating system. Any interface to a Windows physical disk drive is a descendent (or member) of this class. The features of the disk drive seen through this object correspond to the logical and management characteristics of the drive. In some cases, this may not reflect the actual physical characteristics of the device. Any object based on another logical device would not be a member of this class.

For security reasons, a user connecting from a remote computer must have the SC_MANAGER_CONNECT privilege enabled to be able to enumerate this class. For more information, see Service Security and Access Rights.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

[Provider("CIMWin32")]class Win32_DiskDrive : CIM_DiskDrive
{
  uint16   Availability;
  uint32   BytesPerSector;
  uint16   Capabilities[];
  string   CapabilityDescriptions[];
  string   Caption;
  string   CompressionMethod;
  uint32   ConfigManagerErrorCode;
  boolean  ConfigManagerUserConfig;
  string   CreationClassName;
  uint64   DefaultBlockSize;
  string   Description;
  string   DeviceID;
  boolean  ErrorCleared;
  string   ErrorDescription;
  string   ErrorMethodology;
  string   FirmwareRevision;
  uint32   Index;
  datetime InstallDate;
  string   InterfaceType;
  uint32   LastErrorCode;
  string   Manufacturer;
  uint64   MaxBlockSize;
  uint64   MaxMediaSize;
  boolean  MediaLoaded;
  string   MediaType;
  uint64   MinBlockSize;
  string   Model;
  string   Name;
  boolean  NeedsCleaning;
  uint32   NumberOfMediaSupported;
  uint32   Partitions;
  string   PNPDeviceID;
  uint16   PowerManagementCapabilities[];
  boolean  PowerManagementSupported;
  uint32   SCSIBus;
  uint16   SCSILogicalUnit;
  uint16   SCSIPort;
  uint16   SCSITargetId;
  uint32   SectorsPerTrack;
  string   SerialNumber;
  uint32   Signature;
  uint64   Size;
  string   Status;
  uint16   StatusInfo;
  string   SystemCreationClassName;
  string   SystemName;
  uint64   TotalCylinders;
  uint32   TotalHeads;
  uint64   TotalSectors;
  uint64   TotalTracks;
  uint32   TracksPerCylinder;
};

Members

The Win32_DiskDrive class has these types of members:

Methods

The Win32_DiskDrive class has these methods.

MethodDescription
Reset

Not implemented. To implement this method, see the Reset method in CIM_DiskDrive for documentation.

SetPowerState

Not implemented. To implement this method, see the SetPowerState method in CIM_DiskDrive for documentation.

 

Properties

The Win32_DiskDrive class has these properties.

Availability
Data type: uint16
Access type: Read-only

Availability and status of the device. Inherited from CIM_LogicalDevice.

ValueMeaning
1 (0x1)

Other

2 (0x2)

Unknown

3 (0x3)

Running or Full Power

4 (0x4)

Warning

5 (0x5)

In Test

6 (0x6)

Not Applicable

7 (0x7)

Power Off

8 (0x8)

Off Line

9 (0x9)

Off Duty

10 (0xA)

Degraded

11 (0xB)

Not Installed

12 (0xC)

Install Error

13 (0xD)

Power Save - Unknown

The device is known to be in a power save mode, but its exact status is unknown.

14 (0xE)

Power Save - Low Power Mode

The device is in a power save state but still functioning, and may exhibit degraded performance.

15 (0xF)

Power Save - Standby

The device is not functioning, but could be brought to full power quickly.

16 (0x10)

Power Cycle

17 (0x11)

Power Save - Warning

The device is in a warning state, though also in a power save mode.

 

BytesPerSector
Data type: uint32
Access type: Read-only
Qualifiers: Units (Bytes)

Number of bytes in each sector for the physical disk drive.

Example: 512

Capabilities
Data type: uint16 array
Access type: Read-only

Array of capabilities of the media access device. For example, the device may support random access (3), removable media (7), and automatic cleaning (9). This property is inherited from CIM_MediaAccessDevice.

ValueMeaning
0

Unknown

1

Other

2

Sequential Access

3

Random Access

4

Supports Writing

5

Encryption

6

Compression

7

Supports Removable Media

8

Manual Cleaning

9

Automatic Cleaning

10

SMART Notification

11

Supports Dual-Sided Media

12

Ejection Prior to Drive Dismount Not Required

 

CapabilityDescriptions
Data type: string array
Access type: Read-only

List of more detailed explanations for any of the access device features indicated in the Capabilities array. Note, each entry of this array is related to the entry in the Capabilities array that is located at the same index. This property is inherited from CIM_MediaAccessDevice.

Caption
Data type: string
Access type: Read-only

Short description of the object. This property is inherited from CIM_ManagedSystemElement.

CompressionMethod
Data type: string
Access type: Read-only

Algorithm or tool used by the device to support compression. This property is inherited from CIM_MediaAccessDevice.

The name of the compression algorithm or one of the following values.

ValueMeaning
Unknown

Whether the device supports compression capabilities or not is not known.

Compressed

The device supports compression capabilities but its compression scheme is not known or not disclosed.

Not Compressed

The device does not support compression.

 

ConfigManagerErrorCode
Data type: uint32
Access type: Read-only

Windows Configuration Manager error code.

ValueMeaning
0 (0x0)

Device is working properly.

1 (0x1)

Device is not configured correctly.

2 (0x2)

Windows cannot load the driver for this device.

3 (0x3)

Driver for this device might be corrupted, or the system may be low on memory or other resources.

4 (0x4)

Device is not working properly. One of its drivers or the registry might be corrupted.

5 (0x5)

Driver for the device requires a resource that Windows cannot manage.

6 (0x6)

Boot configuration for the device conflicts with other devices.

7 (0x7)

Cannot filter.

8 (0x8)

Driver loader for the device is missing.

9 (0x9)

Device is not working properly. The controlling firmware is incorrectly reporting the resources for the device.

10 (0xA)

Device cannot start.

11 (0xB)

Device failed.

12 (0xC)

Device cannot find enough free resources to use.

13 (0xD)

Windows cannot verify the device's resources.

14 (0xE)

Device cannot work properly until the computer is restarted.

15 (0xF)

Device is not working properly due to a possible re-enumeration problem.

16 (0x10)

Windows cannot identify all of the resources that the device uses.

17 (0x11)

Device is requesting an unknown resource type.

18 (0x12)

Device drivers must be reinstalled.

19 (0x13)

Failure using the VxD loader.

20 (0x14)

Registry might be corrupted.

21 (0x15)

System failure. If changing the device driver is ineffective, see the hardware documentation. Windows is removing the device.

22 (0x16)

Device is disabled.

23 (0x17)

System failure. If changing the device driver is ineffective, see the hardware documentation.

24 (0x18)

Device is not present, not working properly, or does not have all of its drivers installed.

25 (0x19)

Windows is still setting up the device.

26 (0x1A)

Windows is still setting up the device.

27 (0x1B)

Device does not have valid log configuration.

28 (0x1C)

Device drivers are not installed.

29 (0x1D)

Device is disabled. The device firmware did not provide the required resources.

30 (0x1E)

Device is using an IRQ resource that another device is using.

31 (0x1F)

Device is not working properly. Windows cannot load the required device drivers.

 

ConfigManagerUserConfig
Data type: boolean
Access type: Read-only

If True, the device is using a user-defined configuration. This property is inherited from CIM_LogicalDevice.

CreationClassName
Data type: string
Access type: Read-only

Name of the first concrete class to appear in the inheritance chain used in the creation of an instance. When used with the other key properties of the class, the property allows all instances of this class and its subclasses to be uniquely identified. This property is inherited from CIM_LogicalDevice.

DefaultBlockSize
Data type: uint64
Access type: Read-only

Default block size, in bytes, for this device. This property is inherited from CIM_MediaAccessDevice.

For more information about using uint64 values in scripts, see Scripting in WMI.

Description
Data type: string
Access type: Read-only

Description of the object. This property is inherited from CIM_ManagedSystemElement.

DeviceID
Data type: string
Access type: Read-only
Qualifiers: Key

Unique identifier of the disk drive with other devices on the system. This property is inherited from CIM_LogicalDevice.

ErrorCleared
Data type: boolean
Access type: Read-only

If True, the error reported in LastErrorCode is now cleared. This property is inherited from CIM_LogicalDevice.

ErrorDescription
Data type: string
Access type: Read-only

More information about the error recorded in LastErrorCode, and information on any corrective actions that may be taken. This property is inherited from CIM_LogicalDevice.

ErrorMethodology
Data type: string
Access type: Read-only

Type of error detection and correction supported by this device. This property is inherited from CIM_MediaAccessDevice.

FirmwareRevision
Data type: string
Access type: Read-only

Revision for the disk drive firmware that is assigned by the manufacturer.

Windows Server 2003 and Windows XP:  This property is not available.

Index
Data type: uint32
Access type: Read-only

Physical drive number of the given drive. This property is filled by the GetDriveMapInfo method. A value of 0xFF indicates that the given drive does not map to a physical drive.

Example: 1

InstallDate
Data type: datetime
Access type: Read-only

Date and time the object was installed. This property does not need a value to indicate that the object is installed. This property is inherited from CIM_ManagedSystemElement.

InterfaceType
Data type: string
Access type: Read-only

Interface type of physical disk drive.

The values are:

SCSI

HDC

IDE

USB

1394

LastErrorCode
Data type: uint32
Access type: Read-only

Last error code reported by the logical device. This property is inherited from CIM_LogicalDevice.

Manufacturer
Data type: string
Access type: Read-only

Name of the disk drive manufacturer.

Example: "Seagate"

MaxBlockSize
Data type: uint64
Access type: Read-only

Maximum block size, in bytes, for media accessed by this device. This property is inherited from CIM_MediaAccessDevice.

For more information about using uint64 values in scripts, see Scripting in WMI.

MaxMediaSize
Data type: uint64
Access type: Read-only

Maximum media size, in kilobytes, of media supported by this device. This property is inherited from CIM_MediaAccessDevice.

For more information about using uint64 values in scripts, see Scripting in WMI.

MediaLoaded
Data type: boolean
Access type: Read-only

If True, the media for a disk drive is loaded, which means that the device has a readable file system and is accessible. For fixed disk drives, this property will always be TRUE.

MediaType
Data type: string
Access type: Read-only

Type of media used or accessed by this device.

Starting with Windows Vista, possible values are:

External hard disk media
Removable media other than floppy
Fixed hard disk media
Format is unknown

Windows Server 2003 and Windows XP:  Possible values are:

Removable media
Fixed hard disk
Unknown
MinBlockSize
Data type: uint64
Access type: Read-only

Minimum block size, in bytes, for media accessed by this device. This property is inherited from CIM_MediaAccessDevice.

For more information about using uint64 values in scripts, see Scripting in WMI.

Model
Data type: string
Access type: Read-only

Manufacturer's model number of the disk drive.

Example: "ST32171W"

Name
Data type: string
Access type: Read-only

Label by which the object is known. When subclassed, the property can be overridden to be a key property. This property is inherited from CIM_ManagedSystemElement.

NeedsCleaning
Data type: boolean
Access type: Read-only

If True, the media access device needs cleaning. Whether manual or automatic cleaning is possible is indicated in the Capabilities property. This property is inherited from CIM_MediaAccessDevice.

NumberOfMediaSupported
Data type: uint32
Access type: Read-only

Maximum number of media which can be supported or inserted (when the media access device supports multiple individual media). This property is inherited from CIM_MediaAccessDevice.

Partitions
Data type: uint32
Access type: Read-only

Number of partitions on this physical disk drive that are recognized by the operating system.

Example: 2

PNPDeviceID
Data type: string
Access type: Read-only

Windows Plug and Play device identifier of the logical device. This property is inherited from CIM_LogicalDevice.

Example: "*PNP030b"

PowerManagementCapabilities
Data type: uint16 array
Access type: Read-only

Array of the specific power-related capabilities of a logical device. This property is inherited from CIM_LogicalDevice.

ValueMeaning
0 (0x0)

Unknown

1 (0x1)

Not Supported

2 (0x2)

Disabled

3 (0x3)

Enabled

The power management features are currently enabled but the exact feature set is unknown or the information is unavailable.

4 (0x4)

Power Saving Modes Entered Automatically

The device can change its power state based on usage or other criteria.

5 (0x5)

Power State Settable

The SetPowerState method is supported. This method is found on the parent CIM_LogicalDevice class and can be implemented. For more information, see Designing Managed Object Format (MOF) Classes.

6 (0x6)

Power Cycling Supported

The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle).

7 (0x7)

Timed Power-On Supported

The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle) and Time set to a specific date and time, or interval, for power-on.

 

PowerManagementSupported
Data type: boolean
Access type: Read-only

If True, the device can be power-managed (can be put into suspend mode, and so on). The property does not indicate that power management features are currently enabled, only that the logical device is capable of power management. This property is inherited from CIM_LogicalDevice.

SCSIBus
Data type: uint32
Access type: Read-only

SCSI bus number of the disk drive.

Example: 0

SCSILogicalUnit
Data type: uint16
Access type: Read-only

SCSI logical unit number (LUN) of the disk drive.

Example: 0

SCSIPort
Data type: uint16
Access type: Read-only

SCSI port number of the disk drive.

Example: 0

SCSITargetId
Data type: uint16
Access type: Read-only

SCSI identifier number of the disk drive.

Example: 0

SectorsPerTrack
Data type: uint32
Access type: Read-only

Number of sectors in each track for this physical disk drive.

Example: 63

SerialNumber
Data type: string
Access type: Read-only

Number allocated by the manufacturer to identify the physical media.

Example: WD-WM3493798728

Windows Server 2003 and Windows XP:  This property is not available.

Signature
Data type: uint32
Access type: Read-only

Disk identification. This property can be used to identify a shared resource. This property has been added for Windows XP.

Size
Data type: uint64
Access type: Read-only
Qualifiers: Units (Bytes)

Size of the disk drive. It is calculated by multiplying the total number of cylinders, tracks in each cylinder, sectors in each track, and bytes in each sector.

For more information about using uint64 values in scripts, see Scripting in WMI.

Status
Data type: string
Access type: Read-only
Qualifiers: MaxLen (10)

Current status of the object. Various operational and nonoperational statuses can be defined. Operational statuses include: "OK", "Degraded", and "Pred Fail" (an element, such as a SMART-enabled hard disk drive, may be functioning properly but predicting a failure in the near future). Nonoperational statuses include: "Error", "Starting", "Stopping", and "Service". The latter, "Service", could apply during mirror-resilvering of a disk, reload of a user permissions list, or other administrative work. Not all such work is online, yet the managed element is neither "OK" nor in one of the other states. This property is inherited from CIM_ManagedSystemElement.

Values are:

"OK"
"Error"
"Degraded"
"Unknown"
"Pred Fail"
"Starting"
"Stopping"
"Service"
"Stressed"
"NonRecover"
"No Contact"
"Lost Comm"
StatusInfo
Data type: uint16
Access type: Read-only

State of the logical device. If this property does not apply to the logical device, the value 5 (Not Applicable) should be used. This property is inherited from CIM_LogicalDevice.

ValueMeaning
1 (0x1)

Other

2 (0x2)

Unknown

3 (0x3)

Enabled

4 (0x4)

Disabled

5 (0x5)

Not Applicable

 

SystemCreationClassName
Data type: string
Access type: Read-only

Value of the scoping computer's CreationClassName property. This property is inherited from CIM_LogicalDevice.

SystemName
Data type: string
Access type: Read-only

Name of the scoping system. This property is inherited from CIM_LogicalDevice.

TotalCylinders
Data type: uint64
Access type: Read-only

Total number of cylinders on the physical disk drive. Note: the value for this property is obtained through extended functions of BIOS interrupt 13h. The value may be inaccurate if the drive uses a translation scheme to support high-capacity disk sizes. Consult the manufacturer for accurate drive specifications.

Example: 657

For more information about using uint64 values in scripts, see Scripting in WMI.

TotalHeads
Data type: uint32
Access type: Read-only

Total number of heads on the disk drive. Note: the value for this property is obtained through extended functions of BIOS interrupt 13h. The value may be inaccurate if the drive uses a translation scheme to support high-capacity disk sizes. Consult the manufacturer for accurate drive specifications.

TotalSectors
Data type: uint64
Access type: Read-only

Total number of sectors on the physical disk drive. Note: the value for this property is obtained through extended functions of BIOS interrupt 13h. The value may be inaccurate if the drive uses a translation scheme to support high-capacity disk sizes. Consult the manufacturer for accurate drive specifications.

Example: 2649024

For more information about using uint64 values in scripts, see Scripting in WMI.

TotalTracks
Data type: uint64
Access type: Read-only

Total number of tracks on the physical disk drive. Note: the value for this property is obtained through extended functions of BIOS interrupt 13h. The value may be inaccurate if the drive uses a translation scheme to support high-capacity disk sizes. Consult the manufacturer for accurate drive specifications.

Example: 42048

For more information about using uint64 values in scripts, see Scripting in WMI.

TracksPerCylinder
Data type: uint32
Access type: Read-only

Number of tracks in each cylinder on the physical disk drive. Note: the value for this property is obtained through extended functions of BIOS interrupt 13h. The value may be inaccurate if the drive uses a translation scheme to support high-capacity disk sizes. Consult the manufacturer for accurate drive specifications.

Example: 64

Remarks

The Win32_DiskDrive class is derived from CIM_DiskDrive which derives from CIM_MediaAccessDevice. The CIM_MediaAccessDevice class derives from CIM_LogicalDevice.

Examples

For script code examples, see WMI Tasks for Scripts and Applications and the TechNet ScriptCenter Script Repository.

For C++ code examples, see WMI C++ Application Examples.

Requirements

Minimum supported client

Windows XP

Minimum supported server

Windows Server 2003

Namespace

\root\CIMV2

MOF

CIMWin32.mof

DLL

CIMWin32.dll

See also

Computer System Hardware Classes

 

 

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