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From: Juli Mallett <jmallett@FreeBSD.org>
Date: Wed, 22 Jul 2009 01:57:23 -0700
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To: Alexander Motin <mav@freebsd.org>
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Subject: Re: svn commit: r195817 - head/usr.sbin/sysinstall
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On Wed, Jul 22, 2009 at 01:42, Alexander Motin<mav@freebsd.org> wrote:
> Colin Percival wrote:
>> =A0 Remove the "dedicated disk mode" partitioning option from sysinstall=
, in
>> =A0 both the disk partitioning screen (the 'F' key) and via install.cfg =
(the
>> =A0 VAR_DEDICATED_DISK option). =A0This functionality is currently broke=
n in 8.x
>> =A0 due to libdisk and geom generating different partition names; this c=
ommit
>> =A0 merely acts to help steer users away from the breakage.
>
> Is there any other way to not align FS block to the ugly legacy 63
> sectors per track boundary with sysinstall now? I think RAIDs won't be
> happy. May be it would be better to fix it?

If you're interested in fixing this issue, you might want to look at
the need for compatibility names so that existing DD installs aren't
broken, and so DD installs work as-is without correcting libdisk's
expectations about slice/partition names for DD disks, which is pretty
invasive, too.  Not breaking new installs by not letting users install
broken systems is the absolute bare minimum approach, and given the
late date and the lack of movement on the kernel side, I've been
advocating for it for a while.

See this message and others in the thread for some background:

http://lists.freebsd.org/pipermail/freebsd-geom/2009-June/003567.html

Juli.