On Fri, May 21, 2010 at 3:12 AM, Alain Mouette <ala...@pobox.com> wrote:
>
> Em 20-05-2010 15:44, Liam Proven escreveu:
>>
>> You have been lucky. I have seen many incorrectly-partitioned systems
>> with multiple primaries where some drives were not visible, on various
>> versions of MS-DOS and up to Windows 95.
>
> Not Lucky, just hard work. Partitions were invented without entented
> partitions, so it worked from the first...
>
>> It's not a good idea; unpredictable things can happen, such as writing
>> to the wrong "C" drive and causing corruption.
>
> I didn't say that it is easy ;)
>
>>> The rules of letter attibuting are very strange:
>>> 1) the first (sometives the active) partition of each drive
>>> 2) all extended partitions from each drive at a time. There were issues
>>> as to sequences in recurrent extended partitions.
>>> 3) all remaining primary partitions of each drive.
>>
>> Wrong way round.
>>
>> It is:
>>   - enumerate all primaries, drive by physical drive
>
> Not at all.
>
>>   - then enumerate all logical drives on each physical drive, stepping
>> through the drives as each is exhausted
>
> Ok
>
>> It is logical but confusing. Win7 no longer does this at all - the
>> boot drive is always C;
>
> That is a definition: boot is allways C:
>
>> if there was an existing DOS-level C, it seems to disappear.
>
> There are lots of bugs in this area.
>
> FYI: I started using PC-DOS 1.1... so I have a long history of dos and
> don'ts...

DOS 3.1 here, 23 years ago, so a little newer.

But some of what you are saying directly contradicts my own
experience. I don't see any profit in arguing over it, though.


-- 
Liam Proven • Profile: http://www.linkedin.com/in/liamproven
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