Date: Thu, 23 Apr 2020 14:20:57 -0700 From: Mark Millard <marklmi@yahoo.com> To: Jonathan Chen <jonc@chen.org.nz>, bob prohaska <fbsd@www.zefox.net> Cc: freebsd-arm <freebsd-arm@freebsd.org>, Georg Lindenberg <georg.lindenberg@web.de> Subject: Re: Booting from USB on RPI3 Message-ID: <A85E6F37-A916-44F6-80E0-3C097C3CDCED@yahoo.com> In-Reply-To: <CAJuc1zOTnoRmeaKXHMTH9po=6ipBYDxvxAoiVmow-sNgwUERVQ@mail.gmail.com> References: <mailman.61.1587470402.80084.freebsd-arm@freebsd.org> <trinity-4938b1d4-f29f-4907-bedd-65be21112e48-1587489497227@3c-app-webde-bs65> <20200421181224.GC96994@www.zefox.net> <trinity-19081201-3024-4046-817a-48321c51a515-1587587309088@3c-app-webde-bap64> <20200423162124.GA3583@www.zefox.net> <CAJuc1zMHL6ke3LH67iV8%2BogKFO18xwW_v7bRAUsj8CbxD2EOTw@mail.gmail.com> <8D1F6A8D-4910-4C1E-8EB5-2F5F89E31120@yahoo.com> <CAJuc1zOTnoRmeaKXHMTH9po=6ipBYDxvxAoiVmow-sNgwUERVQ@mail.gmail.com>
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On 2020-Apr-23, at 13:32, Jonathan Chen <jonc@chen.org.nz> wrote:
> On Fri, 24 Apr 2020 at 08:22, Mark Millard <marklmi@yahoo.com> wrote:
> [...]
>> The RPi3 will not start to boot from a gpt partitioned
>> media. So picking gpt labeling as the example is somewhat
>> misleading for single-media booting. glabel based
>> labeling would be more realistic for the context.
Note the "single-media booting" reference above.
> The OP is attempting to boot off an external USB drive via loader.env.
> So it's the external drive's partitioning system that is of interest.
> FYI, my RPI3 boots off a GPT partition fine:
>=20
> 1.topaz:~,8:30am# uname -a
> FreeBSD topaz.inside.chen.org.nz 12.1-STABLE FreeBSD 12.1-STABLE #0
> r358927: Sun Mar 15 22:24:30 NZDT 2020
> =
jonc@onyx.inside.chen.org.nz:/xbuilds/rpi3/obj/usr/src/arm64.aarch64/sys/G=
ENERIC
> arm64
> 1.topaz:~,8:30am# gpart show -l da0
> =3D> 40 976773088 da0 GPT (466G)
> 40 8152 - free - (4.0M)
> 8192 964689920 1 topaz-root (460G)
> 964698112 12075016 2 topaz-swap (5.8G)
>=20
> 1.topaz:~,8:30am# cat /etc/fstab
> # Device Mountpoint FStype Options Dump =
Pass#
> /dev/gpt/topaz-root / ufs rw 1 =
1
> /dev/gpt/topaz-swap none swap sw 0 =
0
>=20
That does not appear to have the msdosfs/EFI material
on the USB drive. So I'd guess that you are using
the microsd card for that: 2 media overall, not
single-media.
I also use a form of two-media instead of single-media
and use gpt on the USB media:
# gpart show
=3D> 63 249737153 mmcsd0 MBR (119G)
63 16380 - free - (8.0M)
16443 131040 1 fat32lba [active] (64M)
147483 997 - free - (499K)
148480 241172480 2 freebsd (115G)
241320960 8416256 - free - (4.0G)
=3D> 0 241172480 mmcsd0s2 BSD (115G)
0 230686720 1 freebsd-ufs (110G)
230686720 10485760 - free - (5.0G)
=3D> 40 468862048 da0 GPT (224G)
40 2008 - free - (1.0M)
2048 413138944 1 freebsd-ufs (197G)
413140992 6291456 2 freebsd-swap (3.0G)
419432448 6291456 4 freebsd-swap (3.0G)
425723904 43138184 - free - (21G)
# df -m
Filesystem 1M-blocks Used Avail Capacity Mounted on
/dev/gpt/PINE642Groot 195378 34775 144973 19% /
devfs 0 0 0 100% /dev
/dev/label/PINE64P2Groot 109101 219 100153 0% /microsd_ufs
/dev/label/PINE642GAboot 63 43 20 69% /boot/efi
I choose to have a copy of /boot on /microsd_ufs
and to use vfs.root.mountfrom=3D"ufs:/dev/gpt/PINE642Groot"
in the loader.conf file in my context.
But such is not what Bob P. is trying to do from what
I can tell. He looks to be trying to avoid microsd
card media use if he can. He needs MBR on the USB
media for that (or some hybrid MBR that proves
compatibile).
=3D=3D=3D
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
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