MBR was first introduced with IBM PC DOS 2.0 in 1983 (Master Boot Record) contains the initial boot loader.
- The boot loader is a small bit of code that generally loads the larger boot loader from another partition on a drive.
- MBR only works with disks up to 2 TB in size and only supports up to 4 primary partitions.
- On an MBR disk, the partitioning and boot data is stored in one place. If this data is overwritten or corrupted, youâ€™re in trouble.
GPT isÂ a newer standard thatâ€™s gradually replacing MBR.
- GPT allows for a nearly unlimited numberÂ of partitions.
- GPT stores multiple copies of this data across the disk, so itâ€™s much more robust and can recover if the data is corrupted.
- If you try to manage a GPT disk with an old tool that can only read MBRs, it will see a single partition that extends across the entire drive (Protective MBR).
UEFI replaces the clunky old BIOS with something more modern.Â GPT needs UEFI,.
- Windows can only boot from GPT on UEFI-based computers running 64-bit versions of Windows 10, 8, 7, Vista, and server versions.
- Linux has built-in support for GPT. Appleâ€™s Intel Macs no longer use Appleâ€™s APT (Apple Partition Table) scheme and use GPT instead.
- UEFI replaces the traditional BIOS on PCs.Â Thereâ€™s no way to switch from BIOS to UEFI on an existing PC.
BIOS / UEFI