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Groups > comp.os.os2.setup.storage > #74

Re: Multiple "Visible" Primaries

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On 2012-12-16 23:58, Paul Ratcliffe wrote:
> On Wed, 28 Nov 2012 09:51:52 +0000, Peter J. Seymour <Newsgroups@pjsey.demon.co.uk> wrote:
>
>>>> Where the idea of primary partitions having to be hidden originates I
>>>> don't know.  It might come from trying to set up a multi boot system
>>>> booting from a primary partition when each boot partition required the
>>>> same letter therefore you had to hide the one(s) you weren't booting
>>>> from.  This is only applicable to windows systems because OS/2 quite
>>>> happily boots from a logical partition.
>>>
>>> It's hard for me to imagine applicability only to Windows, as it is
>>> IBM's own Boot Manager that insists on hiding when more than one
>>> supported primary is present on the same HD. Newer boot managers provide
>>> configurability of whether and which to hide.
>>
>> Are you confusing primary partitions with the same drive letter with
>> primary drives in general? Certainly on my machines, multiple primaries
>> are not hidden except when for instance there are two 'C' drives and one
>> of them is booted, then the other 'C' drive is marked hidden. It is
>> hardly an issue. If the two OS's are instead installed on for instance
>> 'C' and 'D' drives, none of the primaries are ever hidden.
>
> Partitions don't (or didn't pre-LVM) have assigned drive letters.
> You could not have two 'C' drives. It was a meaningless concept.
>
Let's put it this way. Using the configuration in question, I boot up to 
say XP and the next time I come to BM the XP partition shows as C and 
the OS2 partition is hidden. If I then boot up instead to OS2, the next 
time I come to BM, the OS2 partition shows as C and the XP partition is 
hidden. So strictly speaking there is ever only one C partition, but 
because of the switching involving it is convenient to refer to the two 
of them as being the set of possible C partitions (The 2 'C' 
partitions). I suppose the same sort of scenario could occur with three 
or more partitions, but I never tried that.

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Thread

Multiple "Visible" Primaries Felix Miata <UgaddaBkidding.due2UCE@dev.nul> - 2012-11-26 15:22 -0500
  Re: Multiple "Visible" Primaries Paul Ratcliffe <abuse@orac12.clara34.co56.uk78> - 2012-11-26 21:30 +0000
    Re: Multiple "Visible" Primaries Felix Miata <UgaddaBkidding.due2UCE@dev.nul> - 2012-11-26 23:16 -0500
      Re: Multiple "Visible" Primaries "ivan" <ivanjt@free.fr> - 2012-11-27 16:19 +0000
        Re: Multiple "Visible" Primaries Felix Miata <UgaddaBkidding.due2UCE@dev.nul> - 2012-11-27 13:53 -0500
          Re: Multiple "Visible" Primaries "Peter J. Seymour" <Newsgroups@pjsey.demon.co.uk> - 2012-11-28 09:51 +0000
            Re: Multiple "Visible" Primaries Barry Landy <bl10nospam@cam.ac.uk> - 2012-11-28 10:41 +0000
            Re: Multiple "Visible" Primaries Paul Ratcliffe <abuse@orac12.clara34.co56.uk78> - 2012-12-16 23:58 +0000
              Re: Multiple "Visible" Primaries "Peter J. Seymour" <Newsgroups@pjsey.demon.co.uk> - 2012-12-17 08:18 +0000
        Re: Multiple "Visible" Primaries Paul Ratcliffe <abuse@orac12.clara34.co56.uk78> - 2012-12-16 23:55 +0000
      Re: Multiple "Visible" Primaries Paul Ratcliffe <abuse@orac12.clara34.co56.uk78> - 2012-12-16 23:53 +0000

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