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Win32_DiskDrive class
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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
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;
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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;
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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
Properties
Methods
The Win32_DiskDrive class has these methods.Method Description
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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.Value Meaning
1 (0x1)
Other
2 (0x2)
Unknown
3 (0x3)
Running or Full Power
4 (0x4)
Warning
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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)
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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
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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.Value Meaning
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
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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
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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.Value Meaning
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.Value Meaning
0 (0x0)
Device is working properly.
1 (0x1)
Device is not configured correctly.
2 (0x2)
Windows cannot load the driver for this device.
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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)
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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.
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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
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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
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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
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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
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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
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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
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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
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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.Value Meaning
0 (0x0)
Unknown
1 (0x1)
Not Supported
2 (0x2)
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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.
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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
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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
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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
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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
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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
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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
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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 [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Namespace
\root\CIMV2
MOF Cimwin32.mof
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