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Date:      Sun, 17 Jul 2016 11:22:41 -0700
From:      Tim Kientzle <tim@kientzle.com>
To:        Karl Denninger <karl@denninger.net>
Cc:        freebsd-arm <freebsd-arm@freebsd.org>
Subject:   Re: Bizarre clone attempt failures on Raspberry Pi2...
Message-ID:  <841D0760-66D7-43A7-AB6A-AEFEA177DAD6@kientzle.com>
In-Reply-To: <d1aba096-e645-04df-dfda-5a9284250960@denninger.net>
References:  <548783e1-9047-68f7-5f50-449db684d602@denninger.net> <d2eb4035-e494-1a7b-98e5-2aa87efe0763@denninger.net> <EDE65B12-4961-4CEF-8AE9-BFDA4FD508A5@gromit.dlib.vt.edu> <5475ea53-ae22-2634-6f2a-5737d1b0e308@denninger.net> <398ae56c-8893-f188-c210-cf7f19ccf433@denninger.net> <1468518953.72182.219.camel@freebsd.org> <7a91fc79-1c85-fac8-aa3f-db90592f3f44@denninger.net> <bec46aff-a4d5-9c4d-49d0-78534b13f719@denninger.net> <E01579F5-9562-4E51-9CFB-EA510460A4C8@gromit.dlib.vt.edu> <60b6e156-981e-9fbd-b68c-0daae1961286@denninger.net> <04391154-A38E-46CD-B570-B2BECFD19022@gromit.dlib.vt.edu> <d1aba096-e645-04df-dfda-5a9284250960@denninger.net>

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> 
> 
> The quick fix is to put "failok" (or noauto) in the default /etc/fstab
> entry for the dos filesystem, since it is not necessary for that
> filesystem to be mounted at all on a running machine.  If there is a
> policy reason to leave it accessible (and there's a fairly-clean
> argument that there is) then "failok" might be preferable to "noauto",
> but either way forcing a filesystem that is not necessary to be
> accessible or the system fails to come up and does not give any
> indication of same on what many users will have accessible to them is
> facially wrong.

History:  I believe this is something I introduced in Crochet that
has been picked up by the RE build scripts.

Mounting the MSDOS partition as /boot/msdos was intended to
ensure that the critical boot elements were all visible so they
could be easily edited and/or updated.  For example, the
FDT files (and other boot-time configuration files) reside there.

Without this, those components are invisible and hence more
difficult to update on device and also more difficult to explain
and document.

Tim




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