// winioctl.h

typedef struct _FILE_STORAGE_TIER {
  GUID                         Id;
  WCHAR                        Name[FILE_STORAGE_TIER_NAME_LENGTH];
  WCHAR                        Description[FILE_STORAGE_TIER_NAME_LENGTH];
  DWORDLONG                    Flags;
  DWORDLONG                    ProvisionedCapacity;
  FILE_STORAGE_TIER_MEDIA_TYPE MediaType;
  FILE_STORAGE_TIER_CLASS      Class;
} FILE_STORAGE_TIER, *PFILE_STORAGE_TIER;
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Win32 API reference (ns-winioctl-file_storage_tier)

FILE_STORAGE_TIER structure

Description

Represents an identifier for the storage tier relative to the volume.

Members

`Id`

Tier ID.

`Name`

Name for the tier.

`Description`

Note for the tier.

`Flags`

The file storage tier flags. This member can be one or more of the following values.

Value	Meaning
FILE_STORAGE_TIER_FLAG_NO_SEEK_PENALTY 0x00020000	Tier does not suffer a seek penalty on IO operations, which indicates that is an SSD (solid state drive).

`ProvisionedCapacity`

Provisioned capacity of the tier.

`MediaType`

Media type of the tier.

`Class`

Remarks

The storage tier ID for a particular volume has no relationship to the storage tier ID with the same value on a different volume.

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