// winioctl.h

typedef struct _FILE_QUERY_SPARING_BUFFER {
  DWORD   SparingUnitBytes;
  BOOLEAN SoftwareSparing;
  DWORD   TotalSpareBlocks;
  DWORD   FreeSpareBlocks;
} FILE_QUERY_SPARING_BUFFER, *PFILE_QUERY_SPARING_BUFFER;
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Win32 API reference (ns-winioctl-file_query_sparing_buffer)

FILE_QUERY_SPARING_BUFFER structure

Description

Contains defect management properties.

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.

FILE_QUERY_SPARING_BUFFER - NtDoc