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Date: Thu, 18 Aug 2016 16:23:39 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Allan Jude <allanjude@freebsd.org>
Cc: Dag-Erling =?utf-8?B?U23DuHJncmF2?= <des@des.no>,
 Nathan Whitehorn <nwhitehorn@freebsd.org>, svn-src-head@freebsd.org,
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Subject: Re: svn commit: r304142 - head/usr.sbin/bsdinstall/partedit
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On Thu, Aug 18, 2016 at 08:56:55AM -0400, Allan Jude wrote:

> A) If stripesize == 0, use some sane value like 4096
> 
> B) Some other combination that uses the reported stripe size, unless it
> is 0, in which case it uses 4096 (or some other value controlled by a
> different new sysctl)
> 
> C) create kern.geom.min_stripe_size with a default of 512, but users can
> set 4096 if they use only 4k devices. (doesn't really solve the problem
> for the installer)

As I am already pointed default mus be 4096, user can reduce to 512
(or 256/128).