IOCTL_DISK_REASSIGN_BLOCKS_EX IOCTL (ntdddisk.h)
Maps defective blocks to a new location on disk. This request instructs the device to reassign the bad block address to a good block from its spare-block pool.
A IOCTL_DISK_REASSIGN_BLOCKS_EX request allows for a larger number of blocks for assignment than the IOCTL_DISK_REASSIGN_BLOCKS request.
Major code
Input buffer
The buffer at Irp->AssociatedIrp.SystemBuffer contains the REASSIGN_BLOCKS_EX values to be set. Note that this structure contains a variable-sized array of block numbers. It is the caller's responsibility to make sure that the array of block numbers is sorted in ascending order.
Input buffer length
Parameters.DeviceIoControl.InputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer, which must be >= sizeof(REASSIGN_BLOCKS_EX).
Output buffer
None.
Output buffer length
None.
Status block
The Information field is set to zero. The Status field can be set to STATUS_SUCCESS, or possibly to STATUS_INFO_LENGTH_MISMATCH, STATUS_INSUFFICIENT_RESOURCES, or STATUS_BUFFER_TOO_SMALL.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available starting with Windows 8. |
| Header | ntdddisk.h (include Ntdddisk.h) |