Once a remote prospect, an important barrier in disk storage has become a reality: the venerable master boot record (MBR) partitioning scheme can't fully handle disks larger than 2.2TB (2TiB). With disks as large as 3TB readily available and with much larger RAID arrays common, alternatives to the MBR partitioning scheme have become important to understand. The heir apparent is the GUID Partition Table (GPT). Learn how to make sure your Linux system is fully prepared for the future of disk storage.