REASSIGN_BLOCKS_EX structure (ntdddisk.h)

The REASSIGN_BLOCKS_EX structure is used in conjunction with the IOCTL_DISK_REASSIGN_BLOCKS_EX request to instruct a disk device to reassign the block numbers of the indicated bad blocks to good blocks.

Syntax

typedef struct _REASSIGN_BLOCKS_EX {
  USHORT        Reserved;
  USHORT        Count;
  LARGE_INTEGER BlockNumber[1];
} REASSIGN_BLOCKS_EX, *PREASSIGN_BLOCKS_EX;

Members

Reserved

Reserved for system use.

Count

Contains the number of blocks in the array pointed to by BlockNumber to reassign.

BlockNumber[1]

Contains an array of block numbers corresponding to damaged blocks. These numbers will be reassigned to good blocks taken from the device's spare block pool.

Requirements

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

See also

IOCTL_DISK_REASSIGN_BLOCKS_EX