GUID Partition Table (GPT)
Introduction
A modern partition scheme to replace MBR. GPT has several copies across the drive, which avoid crashing when one of the table crashes
Concepts
Protective MBR
Some old computers can’t recognize GPT, thus the first two bytes is “protective MBR”, which can tell older computer that this is a partition scheme that you can’t recognize
Without this, old computer might damage GPT
Primary Header
Following protective MBR are the primary headers which contains critical information for GPT, this includes
- Location and size of partition table
- GUID
- checksum