On Tue, 18 May 2004 16:55:31 +0100 Timothy Murphy managed to misunderstand:
> On Tuesday 18 May 2004 16:34, Brian Foster wrote:
> > still don't have a completely consistent picture
> > of how extended partitions work --- concern here
> > is the non-Linux systems (e.g., BSD and Plan9
> > [ ... ]) I'd like to try. main confusion
> > at the moment is how many logicals per extended
> > there can be? I've read that whilst Linux does
> > support more than one, other systems may not;
> > also, [ I (still!) cannot find an unambiguous maximum
> > of logicals per extended ] --- very confusing! ;-(
>> You're making a perfectly simple matter ridiculously complicated.
> No-one in the history of the universe ever had more than one
> extended partition.
> Why would you want two?
> What possible advantage would it have?
> Do you really want more than 13 partitions?
> You can certainly have hda4 as an extended partiton,
> with logical partitions hda5 - hda14.
( apologies if this is badly formated or
hard to read for some technical reason;
I'm still configuring my SUSE 9.1 system
to my tastes, and know I haven't got all
the details _correct_ yet .... ;-\ )
NO. No. no!, *no* .... I was trying to keep things _SIMPLE_
by _understanding_ the theory: as it turned out, there were
several points which had to brought together (to answer my
original question, “what is the best practice?‟, within the
parameter I set, “extended partitions are new to me‟):
+ extended partitions should only be be the last in each table
(and indeed, in the last (4th) slot of the MBRs table);
+ there is an indeterminate number of logical partitions per
+ each table within an extended should consist of just one
logical optionally followed by a pointer to another table
_within_ the same extended;
+ not all software (e.g., O/S's) like/tolerate/grok anything
else; nor can all boot from a logical.
putting all of that theory together you do indeed come to the
conclusion there can be at most one extended which must be hd¿4.
it took quite a _lot_ of reading between the lines of various
FAQs, HowTo's, and so on to determine the above! (no one
document I found coherently explained _all_ of the above;
and of course, I really wanted to find two independent docs
which both competently explained what I wanted to know.)
and, I am pleased to note, the SUSE 9.1 installer did not let
me do anything else (I tried, but not exhaustively).¹ so, in
a sense, my concerns were foundationless --- but it is (IMHO)
nice to verify the s/w is not doing anything stupid.
¹ I did manage to confuse it; e.g., one time it thought
there should be three ‘hdb3‛s ..... ;-(
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