What does a UEFI BIOS allow regarding partition sizes?

The UEFI (Unified Extensible Firmware Interface) BIOS possesses the capability to support significantly larger partition sizes than traditional BIOS systems. One of the key advantages of UEFI is that it utilizes the GUID Partition Table (GPT), which is designed to overcome the limitations of the older Master Boot Record (MBR) partitioning scheme.

With GPT, the maximum partition size can reach up to 9.4 zettabytes (or approximately 9 billion terabytes), which is far beyond the needs of current storage technologies. This vast capacity allows for extensive use in large storage devices such as enterprise servers, high-capacity data storage, and advanced computing systems, where large volumes of data need to be managed efficiently.

In contrast, older systems relying on MBR have a partition size limitation of up to 2 terabytes, which becomes restrictive as data storage needs grow. Furthermore, UEFI also supports modern partitioning schemes, providing enhanced features such as faster boot times and additional security measures, making it a superior option for contemporary systems.