4k sector support (not good?)

[Warner Losh]

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

>
>
> On Sat, Jul 13, 2019, 9:59 PM Zaphod Beeblebrox <zbeeble at 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 at 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 at 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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>