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DISK_SPACE_INFORMATION structure (fileapi.h)

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The DISK_SPACE_INFORMATION structure contains information about the disk space for a particular volume.

Syntax

typedef struct DISK_SPACE_INFORMATION {
  ULONGLONG ActualTotalAllocationUnits;
  ULONGLONG ActualAvailableAllocationUnits;
  ULONGLONG ActualPoolUnavailableAllocationUnits;
  ULONGLONG CallerTotalAllocationUnits;
  ULONGLONG CallerAvailableAllocationUnits;
  ULONGLONG CallerPoolUnavailableAllocationUnits;
  ULONGLONG UsedAllocationUnits;
  ULONGLONG TotalReservedAllocationUnits;
  ULONGLONG VolumeStorageReserveAllocationUnits;
  ULONGLONG AvailableCommittedAllocationUnits;
  ULONGLONG PoolAvailableAllocationUnits;
  DWORD     SectorsPerAllocationUnit;
  DWORD     BytesPerSector;
} DISK_SPACE_INFORMATION;

Members

ActualTotalAllocationUnits

The ActualTotalAllocationUnits is the total volume size without considering Quota setting.

ActualAvailableAllocationUnits

The ActualTotalAllocationUnits is the available space for the volume without considering Quota setting.

ActualPoolUnavailableAllocationUnits

The ActualPoolUnavailableAllocationUnits is the unavailable space for the volume due to insufficient free pool space

CallerTotalAllocationUnits

The CallerTotalAllocationUnits is the total volume size limited by Quota setting.

CallerAvailableAllocationUnits

The CallerAvailableAllocationUnits is the available space for the volume limited by Quota setting.

CallerPoolUnavailableAllocationUnits

The CallerAvailableAllocationUnits is the unavailable space for the volume due to insufficient free pool space.

UsedAllocationUnits

The used space of the volume.

TotalReservedAllocationUnits

Total reserved space.

VolumeStorageReserveAllocationUnits

A special type of reserved space for per-volume storage reserve. This is included in the TotalReservedAllocationUnits.

AvailableCommittedAllocationUnits

The space that has been committed by storage pool but has not been allocated by file system.

PoolAvailableAllocationUnits

Available space in corresponding storage pool. If the volume is not a spaces volume, the PoolAvailableAllocationUnits is set to 0.

SectorsPerAllocationUnit

The number of sectors per allocation unit for the volume.

BytesPerSector

The number of bytes per sector for the volume.

Requirements

Requirement Value
Header fileapi.h

See also

GetDiskSpaceInformationA

GetDiskSpaceInformationW