Details of GRUB on the PCAbstract This description details the structure at the start of a hard disk in a PC, and how GRUB fits into that structure. [Update Nov 2022: For a discussion of newer boot setups considering UEFI etc. see Linux Boot Partitions] The PC hard disk layout The diagram below is the disk layout of my linux laptop which is very standard. There are 4 primary partitions whose size and function are labeled,
