STORAGE_READ_CAPACITY structure (ntddstor.h)

The STORAGE_READ_CAPACITY contains the disk read capacity information returned from a IOCTL_STORAGE_READ_CAPACITY request.

Syntax

typedef struct _STORAGE_READ_CAPACITY {
  ULONG         Version;
  ULONG         Size;
  ULONG         BlockLength;
  LARGE_INTEGER NumberOfBlocks;
  LARGE_INTEGER DiskLength;
} STORAGE_READ_CAPACITY, *PSTORAGE_READ_CAPACITY;

Members

Version

The version of this structure. Set to sizeof(STORAGE_READ_CAPACITY).

Size

The size of this structure. Set to sizeof(STORAGE_READ_CAPACITY).

BlockLength

The number of bytes per block on disk.

NumberOfBlocks

The total number of blocks on the disk.

DiskLength

The total disk size in bytes.

Requirements

Requirement	Value
Minimum supported client	Available starting with Windows 8.
Header	ntddstor.h (include Ntddstor.h)

See also

IOCTL_STORAGE_READ_CAPACITY