[RFC] Remove requirement of alignment to track from MBR scheme

[Poul-Henning Kamp]

In message <D75B2856-D9D8-4BA3-BC54-8258610CEA06 at 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 at 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.