Efi/mbr freebsd-11.0-RELEASE-p9 unbootable

Polytropon freebsd at edvax.de
Wed Apr 19 08:05:16 UTC 2017

On Wed, 19 Apr 2017 07:51:55 +0000, Manish Jain wrote:
> I strongly recommend to everyone facing problems [or if you have no wish 
> to face them in future] :
> 1) Use Legacy BIOS; not UEFI

Not every platform allows this, primarily due to being "certified"
by MICROS~1. Maybe in the future, UEFI will be the only available
system, and it will be locked down to actively prevent booting
anything that "doesn't fit"...

> 2) Use MBR partitioning; not GPT. This further implies that either use 
> the whole disk (presuming you have only one), or use UFS only (no ZFS)

GPT shouldn't be a problem when you use FreeBSD only. In case you
want to multi-boot, using GPT tends to introduce more trouble and

Allow me to repeat pointing at the following summary of how to
properly initialize disks:


You will also find suggestions on how to deal with UEFI booting
on that page.

> 3) Only install from optical media; not USB stick.

Problematic for modern devices with no optical media reader. And
sometimes, booting from USB DVD drives also doesn't work as intended.

> If you have any problems booting FreeBSD, use the installer to set up a 
> Fixit/Live Shell session and make sure you put Boot Easy to the MBR :
> boot0cfg -B /dev/ada0 # or whatever device corresponds to your disk

Only if you want to boot more than one OS. :-)

Sidenote: If you want to only use FreeBSD, you can also use the
dedicated disk layout (no GPT or MBR at all). Keep in mind this
is the "traditional" way of partitioning a disk, whose concepts
were introduced before the PC era. Interoperability with Linux
or "Windows" is definitely out of scope here. ;-)

> One of the best things in FreeBSD is Boot Easy : it makes life so much 
> sweeter that once you start using it, you will realize that Grub has no 
> place in the FreeBSD world - except for any Linux installation later 
> which should put Grub boot record to its system partition, never the MBR.

Yes, this is important to remember.

Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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