define more partitions in freebsd

[saeedeh motlagh]

thanks Carl,

i tried your your manual step by steps on FreeBSD8.2 but error happened.
this is what i've done:
gpart create -s MBR ad3
ad3 created
gpart add -t freebsd ad3
ad3s1 added
gpart create -s BSD -n 20 ad3s1
gpart: geom 'ad3s1': File Exists

if i do not run the second command and run the third one, it says "invalid
argument".

i don't know what should i do:( any comments or hints are really
appreciated.


On Sun, Jun 2, 2013 at 11:31 PM, Carl Johnson <carlj at peak.org> wrote:

> s m <sam.gh1986 at gmail.com> writes:
>
> > thanks guys,
> >
> > i understand another solution is GPT partitioning. but i prefer to have
> > more partitions in traditional freebsd (with MBR table i think). using
> GPT
> > is the last solution for me.
> >
> > i should create more than 8 partitions with gpart command (flag n which
> > identifies entries) but i have errors when using it. is there any special
> > option which should be included in kernel in order to use gpart with flag
> > n? any one test it before?
> >
> > thanks in advance,
>
> I just tried it on a FreeBSD 8.3 system without any problems.  You will
> need to explain what kind of errors you had before anybody can help you.
> I used a zfs volume for testing as follows:
>
> gpart create -s MBR /dev/zvol/zpool/v/gtest
> gpart add -t freebsd /dev/zvol/zpool/v/gtest
> gpart create -s BSD -n 20 zvol/zpool/v/gtests1
> gpart add -t freebsd-ufs -s 1G zvol/zpool/v/gtests1
> gpart add -t freebsd-swap -s 2G zvol/zpool/v/gtests1
> # add several more freebsd-ufs
> # output from 'gpart show zvol/zpool/v/gtests1'
> =>       0  41942943  zvol/zpool/v/gtests1  BSD  (20G)
>          0   2097152                     1  freebsd-ufs  (1.0G)
>    2097152   4194304                     2  freebsd-swap  (2.0G)
>    6291456   2097152                     4  freebsd-ufs  (1.0G)
>    8388608   2097152                     5  freebsd-ufs  (1.0G)
>   10485760   2097152                     6  freebsd-ufs  (1.0G)
>   12582912   2097152                     7  freebsd-ufs  (1.0G)
>   14680064   2097152                     8  freebsd-ufs  (1.0G)
>   16777216   2097152                     9  freebsd-ufs  (1.0G)
>   18874368   2097152                    10  freebsd-ufs  (1.0G)
>   20971520   2097152                    11  freebsd-ufs  (1.0G)
>   23068672   2097152                    12  freebsd-ufs  (1.0G)
>   25165824   2097152                    13  freebsd-ufs  (1.0G)
>   27262976   2097152                    14  freebsd-ufs  (1.0G)
>   29360128   2097152                    15  freebsd-ufs  (1.0G)
>   31457280   2097152                    16  freebsd-ufs  (1.0G)
>   33554432   2097152                    17  freebsd-ufs  (1.0G)
>   35651584   2097152                    18  freebsd-ufs  (1.0G)
>   37748736   2097152                    19  freebsd-ufs  (1.0G)
>   39845888   2097055                    20  freebsd-ufs  (1G)
> # output from 'disklabel zvol/zpool/v/gtests1'
> # /dev/zvol/zpool/v/gtests1:
> 20 partitions:
> #          size     offset    fstype   [fsize bsize bps/cpg]
>   a:    2097152          0    4.2BSD        0     0     0
>   b:    4194304    2097152      swap
>   c:   41942943          0    unused        0     0     # "raw" part,
> don't edit
>   d:    2097152    6291456    4.2BSD        0     0     0
>   e:    2097152    8388608    4.2BSD        0     0     0
>   f:    2097152   10485760    4.2BSD        0     0     0
>   g:    2097152   12582912    4.2BSD        0     0     0
>   h:    2097152   14680064    4.2BSD        0     0     0
>   i:    2097152   16777216    4.2BSD        0     0     0
>   j:    2097152   18874368    4.2BSD        0     0     0
>   k:    2097152   20971520    4.2BSD        0     0     0
>   l:    2097152   23068672    4.2BSD        0     0     0
>   m:    2097152   25165824    4.2BSD        0     0     0
>   n:    2097152   27262976    4.2BSD        0     0     0
>   o:    2097152   29360128    4.2BSD        0     0     0
>   p:    2097152   31457280    4.2BSD        0     0     0
>   q:    2097152   33554432    4.2BSD        0     0     0
>   r:    2097152   35651584    4.2BSD        0     0     0
>   s:    2097152   37748736    4.2BSD        0     0     0
>   t:    2097055   39845888    4.2BSD        0     0     0
>
> I also tried newfs on all the ufs partitions without problems.  I just
> tried this on a FreeBSD 8.2 system and it works there as well.
>
> --
> Carl Johnson            carlj at peak.org
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-- 
*Sa.M*