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Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics

From Aragorn <thorongil@telenet.be>
Newsgroups alt.os.linux
Subject Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics
Date 2018-09-23 16:16 +0200
Organization A noiseless patient Spider
Message-ID <po877u$101$1@dont-email.me> (permalink)
References (2 earlier) <po5r0v$e7e$1@news.mixmin.net> <po5sui$6le$1@dont-email.me> <po5uet$jc0$1@news.mixmin.net> <po746n$au9$1@dont-email.me> <po841r$kaa$1@news.mixmin.net>

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On Sunday 23 September 2018 15:22, Arlen H. Holder conveyed the 
following to alt.os.linux...

> Do you think we could boot to the Mac (so we use the Mac GUI) and
> access the Linux partition of a dual boot Mac/Ubuntu desktop?

I cannot say this for certain, but with the caveat that the answer may 
be more convoluted than you might suspect.

The thing is that GNU/Linux supports multiple filesystem types as 
"native", by which I mean that they are filesystem types upon which you 
can install (and from which you can run) a GNU/Linux system without any 
problems at all.  

These are the filesystem types that are all supported by the upstream 
Linux kernel as suitable for installing a GNU/Linux system on:

  - ext2 (deprecated, but still functional)
  - ext3
  - ext4
  - btrfs
  - reiserfs (i.e. version 3 ─ reiser4 is not natively supported)
  - XFS
  - JFS
  - F2FS

Now, to the best of my knowledge, Ubuntu does allow one to choose what 
partitioning layout and what filesystems to use during installation, but 
I don't know what the default filesystem choice would be if the user 
doesn't specify anything consciously.  I suspect that it would be ext4, 
but it could just as easily be btrfs these days.  

btrfs is essentially a GPL-licensed rewrite of the ZFS filesystem that 
is native to Solaris, OpenIndiana and FreeBSD.  Like ZFS, btrfs is a 
combined filesystem and volume manager.  It allows one to create dynamic 
subvolumes within a single larger volume, and it supports copy-on-write 
and native RAID functionality.

What I can tell you is that there is a driver for Microsoft Windows ─ 
not included in the Windows system itself natively, but freely 
downloadable from the internet nevertheless ─ for ext2/3/4.  What I do 
NOT know is whether macOS has a similar driver available, nor what other 
filesystems it supports besides the Apple-specific filesystems and 
perhaps FAT/FAT32/exFAT.

> HINT: I know my Windows/Ubuntu dual boot only works in one direction,
> which is that Ubuntu easily mounts Windows filesystem, but Windows
> does not mount the Ubuntu filesystem.

See above; there is a Windows driver available for mounting ext4, but 
it's not included by default in Microsoft Windows.

> Does anyone here know, offhand, if the Mac can mount the Ubuntu
> filesystem?

I suspect not, but there may be an external macOS driver available that 
does this ─ or at least, on account of ext4.

What's strange though is that industry-standard POSIX filesystems like 
XFS and JFS are not natively supported in macOS.  

ext4 is specific to the Linux kernel, but XFS and JFS are industry 
standards in the UNIX world, and macOS is being marketed as a certified 
UNIX.  So one would expect macOS to support those filesystems, but it 
doesn't.

Odd...

-- 
With respect,
= Aragorn =

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Thread

Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-21 19:14 +0000
  Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Mike Easter <MikeE@ster.invalid> - 2018-09-21 12:31 -0700
    Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-21 19:43 +0000
  Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "R.Wieser" <address@not.available> - 2018-09-21 21:42 +0200
    Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-21 20:06 +0000
    Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-21 20:10 +0000
      Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-21 20:21 +0000
        Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-21 21:56 +0000
          Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 01:31 +0000
            Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Danny DeVito <invalid@invalid.invalid> - 2018-09-22 00:59 -0400
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 12:29 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2018-09-22 21:14 -0500
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Rene Lamontagne <rlamont@shaw.ca> - 2018-09-22 21:31 -0500
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Wildman <best_lay@yahoo.com> - 2018-09-22 23:20 -0500
            Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2018-09-22 03:22 -0500
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 12:08 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2018-09-22 21:05 -0500
  Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-22 04:10 +0200
    Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 03:40 +0000
    Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Paul <nospam@needed.invalid> - 2018-09-21 23:41 -0400
      Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 14:11 +0000
    Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 16:35 +0000
      Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-22 19:08 +0200
        Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 17:34 +0000
          Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-23 06:18 +0200
            Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-23 13:22 +0000
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-23 16:16 +0200
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-23 14:52 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-23 15:25 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-24 00:34 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-24 03:15 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-24 05:54 +0200
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Paul <nospam@needed.invalid> - 2018-09-24 05:08 -0400
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-24 10:30 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-24 11:35 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-24 12:09 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-24 13:00 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Jasen Betts <jasen@xnet.co.nz> - 2018-09-24 21:17 +0000
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2018-09-23 14:43 -0500
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-23 19:55 +0000
        Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-22 19:55 +0000
          Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 20:19 +0000
            Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2018-09-22 21:20 -0500
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-23 06:26 +0200
            Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-23 12:50 +0000
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-23 13:55 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Dan Purgert <dan@djph.net> - 2018-09-23 14:40 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-23 15:39 +0000
      Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-22 20:39 +0000
        Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-25 03:38 +0000
          Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-25 07:33 +0200
            Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-25 15:48 +0000
              Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics Aragorn <thorongil@telenet.be> - 2018-09-26 01:09 +0200
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-26 00:07 +0000
                Re: Quick cross-platform question on Ubuntu/MacOS dual boot basics "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-26 00:17 +0000

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