If you follow common partitioning advice, chances are your disk uses several partitions. If you set the sizes incorrectly or if your needs change, you may find yourself needing to resize your partitions. To do so, you must familiarize yourself with the requirements for resizing partitions and the tools that can do the job. In many cases, resizing operations can proceed smoothly; however, numerous stumbling blocks can cause problems for the unwary, or even for those who take adequate precautions.