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 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
md2s1 created
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1a added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1b added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1d added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1e added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1f added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1g added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
md2s1h added
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
gpart: index '9': No space left on device
markand at Melon ~ $ sudo gpart add -t freebsd-ufs -s 1m md2s1
gpart: index '9': No space left on device

Maybe I really need GEOM_PART? Or I'm doing something wrong.

-- 
Demelier David