proper newfs options for SSD disk

[Matthias Apitz]

El día Sunday, May 20, 2012 a las 03:36:01AM +0900, rozhuk.im at gmail.com escribió:

> > 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 at 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.

Hi,

To create the above shown partition layout I have not used gpart(8); I
just said:

    # fdisk -I /dev/ada0
    # fdisk -B /dev/ada0

    # bsdlabel -w ada0s1 auto
    # bsdlabel -B ada0s1

    changed partition "a" from "unused" to "4.2BSD" as partition type:

    # setenv EDITOR /usr/bin/vi
    # bsdlabel -e ada0s1

    created the future root-filesystem on it

    # newfs -m 0 -o space /dev/ada0s1a

The 2nd SSD was formated like this:

    # dd if=/dev/zero of=/dev/ada1 count=2
    # fdisk -I /dev/ada1
    # newfs -m 0 -o space /dev/ada1s1a
    # echo "/dev/ada1s1a  /usr/local  ufs  rw,noatime  1  1" >> /etc/fstab
    # mount /usr/local

What is wrong with this procedure?

Thanks

	matthias

-- 
Matthias Apitz
e <guru at unixarea.de> - w http://www.unixarea.de/
UNIX since V7 on PDP-11, UNIX on mainframe since ESER 1055 (IBM /370)
UNIX on x86 since SVR4.2 UnixWare 2.1.2, FreeBSD since 2.2.5