Mark Knecht <[email protected]> [10-09-11 17:08]:
> On Sat, Sep 11, 2010 at 5:19 AM,  <[email protected]> wrote:
> <SNIP>
> > I think there is some misunderstanding:
> >
> > Before migration to 64bit:
> >
> > /dev/sda3 is mounted on / and contains the 32bit Gentoo
> >
> > /dev/sda10 is mounted on /home/mcc/migration and will contain the
> > stuff of the 64bit Gentoo
> >
> > After migration I will *not* mount /dev/sda10 on / but will clear all
> > stuff from /dev/sda3 and move the contents from /dev/sda10 to
> > /dev/sda3.
> >
> > Is still valid what you said under this premissions, Wonko?
> >
> > Thanks a lot for your help in advance!
> > Best regards
> > mcc
> 
> Why not mount /dev/sda10 as root and be done with it.? No need to move 
> anything.

  ...because data access at the outer partitions are faster than those
  in the middle...

> 
> Do the 64-bit install as you are suggesting. Do NOT install grub.
> 
> Place the 64-bit kernel in the current /boot pointing at /dev/sda10.
> 
> Modify grub.conf to allow you to boot either /dev/sda3 (your 32-bit
> install) or /dev/sda10. (your 64-bit install)
> 
> Boot both installs a few times and test that each is working. (They
> will be) Use the 64-bit install for a few days and make sure it's
> working. When it is don't boot 32-bit for a week or two, just leaving
> it there on the drive because almost certainly you will have forgotten
> to copy something over. (I always do...) Only when you are comfortable
> that 64-bit is working correctly delete the 32-bit on /dev/sda3 if you
> need the disk space.

  In the docs on gentoo-wiki (or? somewhere else?) I read that some
  kind of data are not portable namely databases...

> Remember, leaving /home out of the picture a Gentoo install takes
> maybe 10GB. It's not that large. Probably less if you shared the
> portage distfiles directory between the two.
> 
> It doesn't hurt very much to have multiple installs on the same drive
> in different partitions. It's what I did playing with a stable and a
> testing install. I eventually deleted the testing install and just
> went with stable and a few testing application packages. (I still
> don't understand why any normal user wants a ~amd64 install but that's
> just me!) ;-)

  The normal user like me want 64bit application to access more than
  2GB per task.
  In my case: Rendering and simulation takes a LOT of memory
  especially when it comes to huge counts of vertice or particle
  interactions.
  Therefore I plan to install 8GByte RAM.

> 
> Hope this helps,
> Mark

  Yes Mark, it helps! Thanks a lot! :)

  Best regards
  mcc



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