REASSIGN_BLOCKS_EX structure (winioctl.h)
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.
Syntax
typedef struct _REASSIGN_BLOCKS_EX {
WORD Reserved;
WORD Count;
LARGE_INTEGER BlockNumber[1];
} REASSIGN_BLOCKS_EX, *PREASSIGN_BLOCKS_EX;
Members
Reserved
This member is reserved. Do not use it. Set it to 0 (zero).
Count
The number of blocks to be reassigned.
This is the number of elements that are in the BlockNumber member array.
BlockNumber[1]
An array of Count block numbers, one for each block to be reassigned.
Remarks
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.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008, Windows Server 2003 with SP1 [desktop apps only] |
| Header | winioctl.h (include Windows.h) |