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FILE_QUERY_SPARING_BUFFER structure (winioctl.h)

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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