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# How Partitions and File Systems Work (1 of 5) - Low-level formatting is a process (usually performed at the factory) that organizes the space in a long series of logical blocks; this is called Logical Block Addressing (LBA) - The drive is further organized into one or more partitions using one of...

# How Partitions and File Systems Work (1 of 5) - Low-level formatting is a process (usually performed at the factory) that organizes the space in a long series of logical blocks; this is called Logical Block Addressing (LBA) - The drive is further organized into one or more partitions using one of two partitioning systems: - **MBR partitions** - keeps a map of partitions in a partition table stored at the beginning of the hard drive called the MBR - Can have up to three primary partitions (also called volumes) - A fourth partition (called extended partition) can hold one or more volumes called logical drives - **GPT partitions** - the Globally Unique Identifier Partition Table (GUID or GPT) system can support up to 128 partitions and is required for drives larger than 2.2 TB - First sector in a GPT system contains the protective MBR, which provides information to legacy software that does not support GPT. - All partitions are tracked in a single partition table, stored in the GPT header.