: While BIOS is limited to the Master Boot Record (MBR) scheme (maxing out at 2TB and 4 primary partitions), UEFI uses the GUID Partition Table (GPT) to support drives up to 9.4 zettabytes and up to 128 partitions.
Unified Extensible Firmware Interface (UEFI) boot is the modern standard for starting up a computer, essentially acting as a "mini-operating system" that bridges the gap between hardware firmware and the main operating system. It was developed to replace the aging BIOS (Basic Input/Output System), which had been the standard since the early 1980s but struggled with the demands of modern hardware. Core Advantages Over Legacy BIOS UEFI Boot
: The Secure Boot feature verifies digital signatures for bootloaders and drivers, preventing rootkits and unauthorized code from executing during startup. : While BIOS is limited to the Master
Unlike BIOS, which simply executes code in a disk's first sector, UEFI understands filesystems (primarily FAT32) and searches for specific files: UEFI boot explained (for Linux users) Core Advantages Over Legacy BIOS : The Secure