From owner-freebsd-hackers@FreeBSD.ORG  Sat May 19 18:36:12 2012
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From: rozhuk.im@gmail.com
To: "'Matthias Apitz'" <guru@unixarea.de>
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Date: Sun, 20 May 2012 03:36:01 +0900
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Cc: 'User Wojtek' <wojtek@wojtek.tensor.gdynia.pl>, freebsd-hackers@freebsd.org
Subject: RE: proper newfs options for SSD disk
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> My EeePC netbook shows for the two SSD:
> 
> $ uname -a
> FreeBSD tiny 10.0-CURRENT FreeBSD 10.0-CURRENT #1 r226986: Tue Nov  1
> 14:27:40 CET 2011     guru@caracas:/usr/obj/usr/src/sys/GENERIC  i386
> $ gpart show
> =>     63  7880481  ada0  MBR  (3.8G)
>        63  7880481     1  freebsd  [active]  (3.8G)
> 
> =>      63  31522113  ada1  MBR  (15G)
>         63  31522113     1  freebsd  [active]  (15G)
> 
> =>      0  7880481  ada0s1  BSD  (3.8G)
>         0       16          - free -  (8.0k)
>        16  7880465       1  freebsd-ufs  (3.8G)
> 
> =>       0  31522113  ada1s1  BSD  (15G)
>          0        16          - free -  (8.0k)
>         16  31522097       1  freebsd-ufs  (15G)
> 

Do not use MBR (or manually do all to align).
63 - not 4k aligned.