FILE_QUERY_SPARING_BUFFER structure (winioctl.h)

Contains defect management properties.

Syntax

typedef struct _FILE_QUERY_SPARING_BUFFER {
  DWORD   SparingUnitBytes;
  BOOLEAN SoftwareSparing;
  DWORD   TotalSpareBlocks;
  DWORD   FreeSpareBlocks;
} FILE_QUERY_SPARING_BUFFER, *PFILE_QUERY_SPARING_BUFFER;

Members

SparingUnitBytes

The size of a sparing packet and the underlying error check and correction (ECC) block size of the volume.

SoftwareSparing

If TRUE, indicates that sparing behavior is software-based; if FALSE, it is hardware-based.

TotalSpareBlocks

The total number of blocks allocated for sparing.

FreeSpareBlocks

The number of blocks available for sparing.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	winioctl.h (include Windows.h)

See also

DeviceIoControl

FSCTL_QUERY_SPARING_INFO