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BIOS, UEFI, MBR, GPT, Primary, Extended and Logical Partition Types Explained

This video explains the following topics. What is a firmware? Type of firmware. How the system boots. A firmware performs the following tasks Initialize all hardware devices Find the bootloader program Execute the bootloader program MBR MBR is a classical way to store a bootloader and partition information. It saves information on the first 512 bytes of the hard disk. Only BIOS-based systems use MBR. MBR is non-redundant. MBR can store partition information for a hard disk of up to 2 TB. MBR supports a maximum of 14 partitions. GPT GPT is a modern way to store a bootloader and partition information. It uses 4Kb disk space after the first 512 bytes of the hard disk. Both BIOS and UEFI-based systems can use it. GPT is redundant. GPT can store partition information for a hard disk of up to 18 exabytes. MBR supports a maximum of 128 partitions. BIOS It stands for Basic Input Output System. It operates in 16-bit mode. It was released in 1975. It provides only basic UI navigation using the keyboard. It supports up to 14 partitions. It supports a maximum partition size of 2 TB (Tera Byte). It takes a bit longer time to boot the system. It supports password protection. UEFI It stands for Unified Extensible Firmware Interface. It operates in 32-bit and 64-bit modes. It was released in 2002. It provides graphical UI navigation with mouse support. It supports up to 128 partitions. It supports a maximum partition size of 18 EB (Exabyte). It takes only a few seconds to boot the system. It supports secure boot features.