8 partitions maximum

[David DEMELIER]

2010/12/1 Paul B Mahol <onemda at gmail.com>:
> On 12/1/10, David Demelier <demelier.david at gmail.com> wrote:
>> On 30/11/2010 23:29, Paul B Mahol wrote:
>>> On 11/30/10, David DEMELIER<demelier.david at gmail.com>  wrote:
>>>> 2010/11/30 Paul B Mahol<onemda at gmail.com>:
>>>>> On 11/30/10, David DEMELIER<demelier.david at gmail.com>  wrote:
>>>>>> 2010/11/30 Patrick Lamaiziere<patfbsd at davenulle.org>:
>>>>>>> Le Tue, 30 Nov 2010 21:45:03 +0100,
>>>>>>> David Demelier<demelier.david at gmail.com>  a ecrit :
>>>>>>>
>>>>>>>> Hello,
>>>>>>> Hello,
>>>>>>>
>>>>>>>> We all know that we can only have 8 ufs partitions in one freebsd
>>>>>>>> slice. Since OpenBSD and NetBSD can support at most 32 partitions
>>>>>>>> iirc.
>>>>>>>>
>>>>>>>> I wonder why FreeBSD still lacks more ufs partitions in one slice?
>>>>>>>>
>>>>>>>> Is there any plan to grow up max partitions or every work is
>>>>>>>> dedicated to ZFS?
>>>>>>> hmmm, isn't already done in 8.X ?
>>>>>>> from what's cooking for FreeBSD 8.0
>>>>>>> http://ivoras.sharanet.org/freebsd/freebsd8.html
>>>>>>> <<
>>>>>>> bsdlabel gets extended to 26 partitions
>>>>>>>
>>>>>>> Status: Committed to -CURRENT
>>>>>>> Will appear in 8.0: sure
>>>>>>> Author: Marcel Moolenaar
>>>>>>> Web: commit message
>>>>>>>
>>>>>>> bsdlabel is (finally!) extended to support more than 8 partitions. The
>>>>>>> new limit of 26 partitions comes from the number of lower-case
>>>>>>> letters.
>>>>>>>
>>>>>>> To make use of this change, GEOM_PART needs to be used instead of
>>>>>>> GEOM_BSD (this is default in 8.0 but will not work with older
>>>>>>> kernels).
>>>>>> I don't have GEOM_PART in my kernel, but if you said it's default it
>>>>>> should be pulled in.
>>>>>>
>>>>>>> Regards.
>>>>>>> _______________________________________________
>>>>>>> freebsd-questions at freebsd.org mailing list
>>>>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
>>>>>>> To unsubscribe, send any mail to
>>>>>>> "freebsd-questions-unsubscribe at freebsd.org"
>>>>>>>
>>>>>> But why :
>>>>>>
>>>>>> # /dev/md2s1:
>>>>>> 8 partitions:
>>>>>> #        size   offset    fstype   [fsize bsize bps/cpg]
>>>>>>    a:  10m       16    4.2BSD        0     0
>>>>>>    b:  10m       *    4.2BSD        0     0
>>>>>>    d:  10m       *    4.2BSD        0     0
>>>>>>    e:  10m       *    4.2BSD        0     0
>>>>>>    f:  10m       *    4.2BSD        0     0
>>>>>>    g:  10m       *    4.2BSD        0     0
>>>>>>    h:  10m       *    4.2BSD        0     0
>>>>>>    i:  10m       *    4.2BSD        0     0
>>>>>>    j:  10m       *    4.2BSD        0     0
>>>>>>    k:  10m       *    4.2BSD        0     0
>>>>>>
>>>>>>    c:  2047973        0    unused        0     0         # "raw" part,
>>>>>> don't
>>>>>> edit
>>>>>>
>>>>>> line 11: partition name out of range a-h: i
>>>>>> line 12: partition name out of range a-h: j
>>>>>> line 13: partition name out of range a-h: k
>>>>>> re-edit the label? [y]:
>>>>>>
>>>>>> I'm on 8.1-RELEASE.
>>>>> To make use of such feature you need to recreate table with gpart(8).
>>>>>
>>>>> bsdlabel is not going to work.
>>>>>
>>>> markand at Melon ~ $ sudo dd if=/dev/zero of=myfile.img bs=1m count=100
>>>> 100+0 records in
>>>> 100+0 records out
>>>> 104857600 bytes transferred in 2.095537 secs (50038530 bytes/sec)
>>>> markand at Melon ~ $ sudo mdconfig -a -f myfile.img -u 2
>>>> markand at Melon ~ $ sudo gpart create -s MBR md2
>>>> md2 created
>>>> markand at Melon ~ $ sudo gpart show md2s1
>>>> gpart: No such geom: md2s1.
>>>> markand at Melon ~ $ sudo gpart add -t freebsd md2
>>>> md2s1 added
>>>> markand at Melon ~ $ sudo gpart add -t freebsd-ufs md2s1
>>>> gpart: No such geom: md2s1.
>>>> markand at Melon ~ $ sudo gpart create -s BSD md2s1
>>> gpart create -s BSD -n 26 md2s1
>>
>> markand at Melon ~ $ sudo gpart create -s BSD -n 26 md0s1
>> gpart: entries '26': Invalid argument
>> markand at Melon ~ $ sudo gpart create -s BSD -n 8 md0s1
>> md0s1 created
>>
>
> Looks like max number is 20, up to md2s1t.
>

Yes I saw that it was only 20 max, so how to get 26 partitions using
bsdlabel ? :-)

Cheers,

-- 
Demelier David