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Date:      Sat, 13 Jul 2019 22:09:35 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        Zaphod Beeblebrox <zbeeble@gmail.com>
Cc:        Hans Petter Selasky <hps@selasky.org>, FreeBSD Hackers <freebsd-hackers@freebsd.org>
Subject:   Re: 4k sector support (not good?)
Message-ID:  <CANCZdfpfDqPFWXKNFWtxKA%2BaOEboqiAJyBEF=QBfQxYzpTgxoA@mail.gmail.com>
In-Reply-To: <CANCZdfoG2eqP02_o2JK-_zQ4cHdfPm1Sg73Bw50DSrRCgcs0cg@mail.gmail.com>
References:  <CACpH0McZ50=yoosevUfMSVsHz_nvdQYNY-ozA=BtV-SAaJUjaA@mail.gmail.com> <CACpH0MeEgMUV-1Q4-Z3hJw87oBn07Yy2ypwjG1RuX=6LWgHKhg@mail.gmail.com> <13de3cde-185b-a986-cbce-6ad984792952@selasky.org> <883fbfcf-cac6-99a9-cb6f-43e413be9bb0@selasky.org> <CACpH0Mdm2_Q%2BM2aKjN%2BWVdwRLf0R3HrWPou1EiutodbD8FukhQ@mail.gmail.com> <CACpH0Mcm6QQpQe8kL7WaRaKd0BSNKCL3kQrqTjcSGEBVBYJarg@mail.gmail.com> <CANCZdfoG2eqP02_o2JK-_zQ4cHdfPm1Sg73Bw50DSrRCgcs0cg@mail.gmail.com>

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On Sat, Jul 13, 2019, 10:03 PM Warner Losh <imp@bsdimp.com> wrote:

>
>
> On Sat, Jul 13, 2019, 9:59 PM Zaphod Beeblebrox <zbeeble@gmail.com> wrote:
>
>> Wait... are you saying that our gpart isn't properly able to label a 4k
>> sector disk?
>>
>
> There are competing notions about what is right...
>

For MBR disks. Apple has one standard, which is what the patch is for.
Those disks won't necessarily work on other BIOSes. GPT just works today...

Warner

Warner
>
>
> On Sat, Jul 13, 2019 at 11:54 PM Zaphod Beeblebrox <zbeeble@gmail.com>
>> wrote:
>>
>> > Thank-you.  At this point, I wouldn't be booting from these disks. Right
>> > now I'm just trying to "gpart" or label them and get them ZFS
>> formatted...
>> > so my test rig boots from it's own disks and the target machine boots
>> from
>> > a different pair of disks.
>> >
>> > What I'm after is how to talk to these properly.
>> >
>> > On Sat, Jul 13, 2019 at 2:55 AM Hans Petter Selasky <hps@selasky.org>
>> > wrote:
>> >
>> >> On 2019-07-13 08:35, Hans Petter Selasky wrote:
>> >> > If you want to boot from a 4K disk you need this patch at least:
>> >> > https://reviews.freebsd.org/D19245
>> >>
>> >> Note that this patch must also be installed before trying to create the
>> >> 4K bootable disk!
>> >>
>> >> --HPS
>> >>
>> >
>> _______________________________________________
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>> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers
>> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org
>> "
>>
>



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