Some of the other partition types (such as a BIOS Boot Partition or some non-Linux boot partitions) would never be booted the Linux root (/) partition can't be unmounted and the ESP, like /boot, can be unmounted. It's obvious from the contents of this thread that a Linux /boot partition is under discussion. The boot partition for a non-Linux OS, such as a Windows C: partition.The EFI System Partition (ESP referred to as an 'EFI boot partition' in the Ubuntu 11.04 alpha on EFI-based systems), which holds boot loader files and is required to boot any OS on an EFI-based computer.The BIOS Boot Partition, which is used to hold boot loader files on BIOS-based computers that boot using GRUB on GUID Partition Table (GPT) disks.The partition that Linux boots, aka the root (/) partition.I'd like to point out that there are several types of 'boot' partition:
