8 partitions maximum

[David DEMELIER]

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 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

Thank you, I didn't see this little part of gpart(8).

-- 
Demelier David