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Re: [Design] nested partitions: Unify grub_partition and grub_disk
From: |
Robert Millan |
Subject: |
Re: [Design] nested partitions: Unify grub_partition and grub_disk |
Date: |
Mon, 13 Apr 2009 16:00:37 +0200 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Sat, Apr 11, 2009 at 11:58:05PM +0200, phcoder wrote:
> Ping. Is it ok for me to implement it this way?
I'd really like it if Okuji could give his impression on this one, if
possible.
> phcoder wrote:
>> I forgot to speak about another question: partition naming. I see 2
>> possibilities
>> 1) purely numeric unified naming scheme. It means that
>> (hd0,1,a) becomes (hd0,1,1)
>> On one hand mixed number-letter scheme is similar to what freebsd uses
>> but on the other hand numerical scheme is versatile and allows
>> unlimited nestedness. And I don't see why we would use a scheme
>> specific to one of many supported OSes.
>> 2) Every partition map is allowed to pick the name that it likes as
>> long as it contains no comma. In this way we would need to keep
>> partition-name parsing functions in partitition map modules. It means
>> that this code would be duplicated. But this scheme is better in the
>> cases when partition map has no numbering scheme but instead has labels
>> attached to partitions. But in this case IMO search command should be
>> used find the partition
>>
>> I personally would prefer the first way
>>> Also an interesting question is how would "has_partitions" field be
>>> handled in this scheme.
>>
>> Just ignored. It's actually used only to optimise some code out based
>> on the assumption that some media has no partitions. Performance gain
>> is negligible but if this assumption doesn't hold true grub won't be
>> able to access the partitions which are really here. Famous example is
>> a cdrom. Most people would assume that cdrom has no partitions. But on
>> powerpc bootable cdroms use APM
>>
>>
>>
>
>
> --
>
> Regards
> Vladimir 'phcoder' Serbinenko
>
>
> _______________________________________________
> Grub-devel mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/grub-devel
>
--
Robert Millan
The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
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