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Date:      Sun, 02 Jun 2013 12:01:12 -0700
From:      Carl Johnson <carlj@peak.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: define more partitions in freebsd
Message-ID:  <87y5ascp6v.fsf@oak.localnet>
References:  <CAA_1SgHpcfWmS-CgE1WfQj4GLop9Wgeg__v2tzVbCj8pyt=qiA@mail.gmail.com> <87y5atg73c.fsf@oak.localnet> <CAA_1SgESNUPyH9-h6o-uij1K6arF4-d8GuS-XW5i3pFyXA0uCg@mail.gmail.com>

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s m <sam.gh1986@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@peak.org



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