// ntddstor.h

typedef struct _STORAGE_READ_CAPACITY {
  ULONG         Version;
  ULONG         Size;
  ULONG         BlockLength;
  LARGE_INTEGER NumberOfBlocks;
  LARGE_INTEGER DiskLength;
} STORAGE_READ_CAPACITY, *PSTORAGE_READ_CAPACITY;
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Windows Driver Kit DDI reference (ns-ntddstor-_storage_read_capacity)

_STORAGE_READ_CAPACITY structure

Description

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

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.

STORAGE_READ_CAPACITY - NtDoc