8 partitions maximum

[Paul B Mahol]

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