What is “BIOS BOOT” filesystem type in fedora and why it is required ?

Today while installing Fedora-18 , I noticed an error at installation window ( the place where you define storage partitions). The installer option “begin installation” at bottom of the window was greyed out. By Clicking the error message details from the anaconda screen, I was told that, it is missing “BIOS BOOT” filesystem type.

So, why BIOS BOOT is required and what is that ?

Starting in Fedora 16, on non-EFI x86 (32 and 64 bit) systems, anaconda will default to creating GPT disklabels (partition tables) instead of MSDOS disklabels. On these systems, when booting from a GPT-labelled disk, it is strongly recommended (not necessarily required in all cases, depending on the system’s BIOS/firmware) to create a small (1MiB) BIOS boot partition. This partition will be used by the bootloader (GRUB2) for storage.
Automatic partitioning will create the partition when appropriate, but users who choose custom partitioning will have to create this partition for themselves.
This BIOS boot partition is only necessary on non-EFI x86 systems whose boot device is a GPT-labelled disk.

Please note that , BIOS BOOT is a filesystem type.

After creating that parition I was able to perform/proceed with the installation of fedora 18.

2 Replies to “What is “BIOS BOOT” filesystem type in fedora and why it is required ?”

  1. Very good explanation, good to know abt this traps.
    But it would be better, if there is a link or post related to EFI, UEFI and GPT

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