REASSIGN_BLOCKS_EX - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ntdddisk.h
typedef struct _REASSIGN_BLOCKS_EX {
USHORT Reserved;
USHORT Count;
LARGE_INTEGER BlockNumber[1];
} REASSIGN_BLOCKS_EX, *PREASSIGN_BLOCKS_EX;
View the official Windows Driver Kit DDI reference// winioctl.h
typedef struct _REASSIGN_BLOCKS_EX {
WORD Reserved;
WORD Count;
LARGE_INTEGER BlockNumber[1];
} REASSIGN_BLOCKS_EX, *PREASSIGN_BLOCKS_EX;
View the official Win32 API referenceNo description available.
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.
ReservedReserved for system use.
CountContains the number of blocks in the array pointed to by BlockNumber to reassign.
BlockNumberContains 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.
Contains disk block reassignment data. This is a variable length structure where the last member is an array of block numbers to be reassigned. It is used by the IOCTL_DISK_REASSIGN_BLOCKS_EX control code.
ReservedThis member is reserved. Do not use it. Set it to 0 (zero).
CountThe number of blocks to be reassigned.
This is the number of elements that are in the BlockNumber member array.
BlockNumberAn array of Count block numbers, one for each block to be reassigned.
The REASSIGN_BLOCKS_EX structure supports drives that have an 8-byte Logical Block Address (LBA), which is typically required for storage devices larger than 2 TB. The REASSIGN_BLOCKS structure used with the IOCTL_DISK_REASSIGN_BLOCKS control code supports devices with up to a 4-byte LBA should be used where possible.