MSFT_PhysicalDisk class

Represents a subsystem drive or spindle.

The following syntax is simplified from Managed Object Format (MOF) code.

Syntax

class MSFT_PhysicalDisk : MSFT_StorageFaultDomain
{
  UInt16  UniqueIdFormat;
  String  DeviceId;
  String  FriendlyName;
  UInt16  HealthStatus;
  UInt16  OperationalStatus[];
  String  OperationalDetails[];
  String  PhysicalLocation;
  UInt16  VirtualDiskFootprint;
  UInt16  Usage;
  UInt16  SupportedUsages[];
  String  Description;
  String  PartNumber;
  String  FirmwareVersion;
  String  SoftwareVersion;
  UInt64  Size;
  UInt64  AllocatedSize;
  UInt16  BusType;
  Boolean IsWriteCacheEnabled;
  Boolean IsPowerProtected;
  UInt64  PhysicalSectorSize;
  UInt64  LogicalSectorSize;
  UInt32  SpindleSpeed;
  Boolean IsIndicationEnabled;
  UInt16  EnclosureNumber;
  UInt16  SlotNumber;
  Boolean CanPool;
  UInt16  CannotPoolReason[];
  String  OtherCannotPoolReasonDescription;
  Boolean IsPartial;
  UInt16  MediaType;
};

Members

The MSFT_PhysicalDisk class has these types of members:

Methods

The MSFT_PhysicalDisk class has these methods.

MethodDescription
Maintenance

Allows maintenance operations to be performed on the physical disk while in a concrete pool, such as firmware updates.

Reset

Resets the physical disk.

SetAttributes

Updates the attributes of the physical disk.

SetDescription

Sets or changes the description for the physical disk.

SetFriendlyName

Sets or changes the friendly name for the physical disk.

SetUsage

Sets or changes the intended usage for the physical disk within a concrete pool.

SetWriteCache

Allows the physical disk's write cache to be enabled or disabled.

 

Properties

The MSFT_PhysicalDisk class has these properties.

AllocatedSize
Data type: UInt64
Access type: Read-only
Qualifiers: Units ("Bytes")

The total amount of used space on this physical disk. This should include usage from all storage pools and other data stored on the disk.

BusType
Data type: UInt16
Access type: Read-only
Qualifiers: Required

The storage bus type of the physical disk.

ValueMeaning
Unknown
0

The bus type is unknown.

SCSI
1

SCSI

ATAPI
2

ATAPI

ATA
3

ATA

1394
4

IEEE 1394

SSA
5

SSA

Fibre Channel
6

Fibre Channel

USB
7

USB

RAID
8

RAID

iSCSI
9

iSCSI

SAS
10

Serial Attached SCSI (SAS)

SATA
11

Serial ATA (SATA)

SD
12

Secure Digital (SD)

MMC
13

Multimedia Card (MMC)

MAX
14

This value is reserved for system use.

File Backed Virtual
15

File-Backed Virtual

Storage Spaces
16

Storage Spaces

NVMe
17
Microsoft Reserved
18..

This value is reserved for system use.

 

CannotPoolReason
Data type: UInt16 array
Access type: Read-only
Qualifiers: Required

An array of values specifying the reasons why this physical disk cannot be added to a concrete pool. This property is valid only if the CanPool property is FALSE.

Unknown (0)
Other (1)
In a Pool (2)
Not Healthy (3)
Removable Media (4)
In Use by Cluster (5)
Offline (6)
Insufficient Capacity (7)
Spare Disk (8)
Reserved by subsystem (9)
Starting (10)
Microsoft Reserved (..)
Vendor Reserved (0x8000..)
CanPool
Data type: Boolean
Access type: Read-only
Qualifiers: Required

TRUE if this physical disk can be added to a concrete pool.

Description
Data type: String
Access type: Read-only

A user-settable description of the physical disk.

DeviceId
Data type: String
Access type: Read-only

An address or other identifier that uniquely names the physical disk.

EnclosureNumber
Data type: UInt16
Access type: Read-only

The number of the enclosure in which the disk physically resides.

FirmwareVersion
Data type: String
Access type: Read-only
Qualifiers: Required

A string representation of the firmware revision.

FriendlyName
Data type: String
Access type: Read-only
Qualifiers: Required

A user-friendly display name for the physical disk. The initial value should be set by the storage provider or subsystem, and can be modified by the user at any point in the object's lifetime.

HealthStatus
Data type: UInt16
Access type: Read-only

A high-level indication of device health.

ValueMeaning
0

Healthy

1

Warning

2

Unhealthy

5

Unknown

 

IsIndicationEnabled
Data type: Boolean
Access type: Read-only

Indicates whether the physical disk's identification LEDs are active or not. This is typically used in maintenance operations.

IsPartial
Data type: Boolean
Access type: Read-only

TRUE if this physical disk is partially consumed by a system or service outside of normal storage pool operations.

IsPowerProtected
Data type: Boolean
Access type: Read-only

Indicates whether this physical disk is equipped to tolerate a power loss without loss of data.

IsWriteCacheEnabled
Data type: Boolean
Access type: Read-only

Indicates whether write caching is enabled on this physical disk or not.

LogicalSectorSize
Data type: UInt64
Access type: Read-only
Qualifiers: Required, Units ("Bytes")

The logical sector size of the physical disk, in bytes. For example: a 4K native disk should report 4096, while a 512-byte emulated disk should report 512.

MediaType
Data type: UInt16
Access type: Read-only

The media type of the physical disk.

ValueMeaning
0

Unspecified

3

HDD

4

SSD

5

SCM

 

OperationalDetails
Data type: String array
Access type: Read-only

An array of strings providing further information on a given operational status.

OperationalStatus
Data type: UInt16 array
Access type: Read-only

An array of operational status values further explaining a given health status.

OtherCannotPoolReasonDescription
Data type: String
Access type: Read-only

A string containing the vendor-defined reason why this physical disk cannot be added to a concrete pool. This property must be NULL if the value of the CannotPoolReason property is not Other.

PartNumber
Data type: String
Access type: Read-only
Qualifiers: Required

A string representation of the physical disk's part number or SKU.

PhysicalLocation
Data type: String
Access type: Read-only

This field is a free-form string indicating where the hardware is located.

PhysicalSectorSize
Data type: UInt64
Access type: Read-only
Qualifiers: Required, Units ("Bytes")

The physical sector size of the physical disk, in bytes. For example: for 4K native and 512-byte emulated disks, the value of this property should be 4096.

Size
Data type: UInt64
Access type: Read-only
Qualifiers: Units ("Bytes")

Total physical storage size of the disk, in bytes.

SlotNumber
Data type: UInt16
Access type: Read-only

The number of the enclosure slot in which the disk physically resides.

SoftwareVersion
Data type: String
Access type: Read-only
Qualifiers: Required

A string representation of the software version number.

SpindleSpeed
Data type: UInt32
Access type: Read-only
Qualifiers: Required, Units ("RPM")

The rotational speed of spindle-based physical disks. For solid state devices (SSDs) or other non-rotational media, this member should be set to 0. For rotating media that has an unknown speed, this member should be set to 0xFFFFFFFF (UINT32_MAX).

SupportedUsages
Data type: UInt16 array
Access type: Read-only
Qualifiers: Required

An array of values that specify the supported usages for this physical disk.

ValueMeaning
Unknown
0

The intended usage is not specified.

Auto-Select
1

This physical disk should only be used for data storage.

Manual-Select
2

This physical disk should only be used if manually selected by an administrator at the time of virtual disk creation. A manual-select disk is selected using the PhysicalDisksToUse parameter to CreateVirtualDisk.

Hot Spare
3

This physical disk should be used as a hot spare.

Retired
4

This physical disk should be retired from use. At a minimum, no new allocations should go to this disk. If the virtual disks that reside on this disk are repaired, the data should be moved to another active physical disk.

Journal
5

This physical disk should be used as a cache for other devices comprising a virtual disk. It will back a virtual disk’s write-back cache, if configured.

 

UniqueIdFormat
Data type: UInt16
Access type: Read-only
Qualifiers: Required

Indicates the type of identifier used in the UniqueId field (inherited from MSFT_StorageObject). The identifier used in UniqueId must be the highest available identifier using the following order of preference: 8 (highest), 3, 2, 1, 0 (lowest). For example, if the physical disk device exposes identifiers of type 0, 1, and 3, UniqueId must be the identifier of type 3, and UniqueIdFormat should be set to 3.

Vendor Specific (0)
Vendor Id (1)
EUI64 (2)
FCPH Name (3)
SCSI Name String (8)
Usage
Data type: UInt16
Access type: Read-only
Qualifiers: Required

The intended usage of this physical disk within a concrete pool.

Storage pools are required to follow the assigned policy for a physical disk.

ValueMeaning
Unknown
0

The intended usage is not specified.

Auto-Select
1

This physical disk should only be used for data storage.

Manual-Select
2

This physical disk should only be used if manually selected by an administrator at the time of virtual disk creation. A manual-select disk is selected using the PhysicalDisksToUse parameter to CreateVirtualDisk.

Hot Spare
3

This physical disk should be used as a hot spare.

Retired
4

This physical disk should be retired from use. At a minimum, no new allocations should go to this disk. If the virtual disks that reside on this disk are repaired, the data should be moved to another active physical disk.

Journal
5

This physical disk should be used as a cache for other devices comprising a virtual disk. It will back a virtual disk’s write-back cache, if configured.

 

VirtualDiskFootprint
Data type: UInt16
Access type: Read-only

This field indicates the size in bytes of the user data footprint from virtual disks on this physical disk.

Requirements

Minimum supported client

Windows 8 [desktop apps only]

Minimum supported server

Windows Server 2012 [desktop apps only]

Namespace

Root\Microsoft\Windows\Storage

MOF

Storagewmi.mof

 

 

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