The RewritePartition property specifies whether the partition information has changed. When you change a partition (with ...

The RewritePartition property specifies whether the partition information has changed. When you change a partition (with IOCTL_DISK_SET_DRIVE_LAYOUT), the system uses this property member to determine which partitions have changed and need their information rewritten.
Values: TRUE or FALSE. If TRUE, the partition needs to be rewritten.