From owner-freebsd-geom@FreeBSD.ORG  Mon May 23 17:52:11 2011
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To: Marcel Moolenaar <marcel@xcllnt.net>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Mon, 23 May 2011 09:35:52 MST."
	<D75B2856-D9D8-4BA3-BC54-8258610CEA06@xcllnt.net> 
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Date: Mon, 23 May 2011 17:33:03 +0000
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Cc: Marcel Moolenaar <marcel@FreeBSD.org>,
	"Andrey V. Elsukov" <bu7cher@yandex.ru>,
	Warner Losh <imp@FreeBSD.org>, freebsd-geom@FreeBSD.org
Subject: Re: [RFC] Remove requirement of alignment to track from MBR scheme 
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In message <D75B2856-D9D8-4BA3-BC54-8258610CEA06@xcllnt.net>, Marcel Moolenaar 
writes:

>I think we've had enough rushed and ill thought-out changes going
>in already and I can see that not aligning MBR partitions on a track
>boundary is potentially perceived as a PITA violation.

We should suggest track alignment on creation, but not enforce it.

There are a lot of valid reasons to not track-align, most commonly
the desire to not shoot RAID-5 performance in the foot.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.