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Re: 10.13.1 won't install

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In message <1nfjzxq.89l29o1ey0th0N%dcohenspam@talktalk.net> Daniel Cohen <dcohenspam@talktalk.net> wrote:
> Lewis <g.kreme@gmail.com.dontsendmecopies> wrote:

>> In message <1nfi2ot.1hgl69si396u8N%dcohenspam@talktalk.net> Daniel Cohen
>> <dcohenspam@talktalk.net> wrote: > JF Mezei
>> <jfmezei.spamnot@vaxination.ca> wrote:
>> 
>> >> On 2017-11-14 12:34, Daniel Cohen wrote:
>> >> 
>> >> > That does seem likely. It would mean that one could have two full system
>> >> > disks without trouble most of the time (currently it's working ok for me
>> >> > for a few days of switching) but there could be trouble if the recovery
>> >> > partition was needed.
>> >> 
>> >> I suspect that Apple recommends that having 2 system volumes on same
>> >> disks should be done with separate GUID partitions (each with their owm
>> >> APFS file systyems consisting of system and recovery partitions).
>> >> 
>> >> This way, you can update either without messing with the other's files
>> >> and recovery partition.
>> 
>> > I also suspect that this is what Apple would recommend. But have they
>> > actually said that yet?
>> 
>> Documentation on APFS is still sparse, which makes sense as they are
>> still making chances to it.
>> 
>> However, looking at how a boot drive is setup on a volume, it seems
>> obvious that two different system installs are going to break since
>> there is ONE Recovery partition, and ONE VM partition and ONE PreBoot
>> partition.
>> 
>> You would necessarily have to have a new top-level APFS container in
>> order for this to work.
>> 
>> > I'm not sure whether they will provide simple procedures (automatic?)
>> > for building APFS systems on two GUID partitions, but of course it is
>> > automatic when there's only one partition.
>> 
>> I'm sure they will not expose this in the GUI.
>> 
>> > Anyway, the discussion has convinced me to go back to the start and
>> > reinstall and see if that procedure does work.
>> 
>> I would strongly recommend that you only have one macOS version per
>> physical drive.

> You, and some of the others who replied to my post, have much more
> technical knowledge than me, and I had been happy to accept your views.

> But I asked David Nanian (of SuperDuper), who I reckon must know more
> about APFS than most people, even those here. And he told me

> "Recovery volumes for APFS volumes are shared and correct; each separate
> volume has its own special section in Recovery. The same holds true for
> Preboot. Don't listen to friends who don't understand this stuff at a
> technical level... they are often wrong. "

That's interesting, and I'm sure he's right. My guess was based on
seeing the sorts of issues people were having with multiple boot
partitions on the same physical drive.

But yes, as you correctly surmise, David Nanian is going to know more
than anyone here.

That said, I still think there's an issue with it.

-- 
Worlds on worlds are rolling ever
From creation to decay,
Like the bubbles on a river
Sparkling, bursting, borne away. -- Shelly

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10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-13 00:27 +0000
  Re: 10.13.1 won't install Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-11-13 11:33 +0000
    Re: 10.13.1 won't install nmassello@yahoo.com (Neill Massello) - 2017-11-13 08:08 -0700
      Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-14 07:30 +0000
        Re: 10.13.1 won't install JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-11-14 02:48 -0500
          Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-14 17:34 +0000
            Re: 10.13.1 won't install JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-11-14 14:41 -0500
              Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-15 00:12 +0000
                Re: 10.13.1 won't install Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-11-15 17:43 +0000
                Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-16 08:27 +0000
                Re: 10.13.1 won't install nmassello@yahoo.com (Neill Massello) - 2017-11-16 02:39 -0700
                Re: 10.13.1 won't install JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-11-16 20:10 -0500
                Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-17 19:17 +0000
                Re: 10.13.1 won't install Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-11-16 18:07 +0000
                Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-17 19:16 +0000
                Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-19 15:17 +0000
                Re: 10.13.1 won't install nmassello@yahoo.com (Neill Massello) - 2017-11-19 10:05 -0700
                Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-20 19:49 +0000
                Re: 10.13.1 won't install Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-11-19 19:06 +0000
                Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-20 19:49 +0000
                Re: 10.13.1 won't install JF Mezei <jfmezei.spamnot@vaxination.ca> - 2017-11-16 19:45 -0500
        Re: 10.13.1 won't install nmassello@yahoo.com (Neill Massello) - 2017-11-14 13:20 -0700
          Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-15 00:12 +0000
    Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-14 07:16 +0000
  Re: 10.13.1 won't install dcohenspam@talktalk.net (Daniel Cohen) - 2017-11-13 11:41 +0000

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