Re: [CentOS] MIgrate/Upgrade from Centos 5.4 32bit to Centos 5.4 64bit

-- Oliver Schulze L. http://tinymailto.com/oliver El 05/01/10 17:09, Robert Heller escribió: > At Tue, 5 Jan 2010 11:26:32 -0800 CentOS mailing listcentos@centos.org wrote: > > >> On Tue, Jan 5, 2010 at 11:24 AM, MHRmhullrich@gmail.com wrote: >> >>> On Tue, Jan 5, 2010 at 7:46 AM, Oliver Schulze L.oliver@samera.com.py wrote: >>> >>>> Hi, >>>> It is posible to do a simple procedure to upgrade a Centos 5.4 32bits >>>> (i686) to >>>> a Centos 5.4 64bits(x32_64)? >>>> >>>> I was thinking about an upgrade or install without formating. >>>> >>>> I will have a current backup before doing it. >>>> >>>> Any advice/tips is welcome. >>>> >>>> >>> I *strongly* doubt it. When you go from 32 to 64 bit systems, you are >>> essentially replacing the kernel and (at least) about 90% of the >>> standard libraries. I am willing to bet that this mandates an >>> installation. >>> >>> For the record, I've never tried it. When I put CentOS on my machine, >>> I already had a 64-bit CPU and I never seriously considered NOT using >>> the 64-bit install. >>> >>> HTH. >>> >>> mhr >>> >>> >> Sorry - PS: IIRC, you don't _have_ to format your disks to install >> over what's on them - check the installation options when you get that >> far and read through them carefully. You should be able to re-use >> existing partitions, but I can't remember whether that *requires* >> reformatting them - I've just always done that (reformat them). >> > You really should/ought to reformat /, /usr, and /var. /boot and /home > don't need to be reformated (leaving /boot alone allows for multi-OS > version booting, eg CentOS 4 and CentOS 5 or Ubuntu and CentOS or CentOS > and Fedora, etc.). The installer will be unhappy about NOT reformatting > /, /usr, or /var. It will warn about not reformatting /boot -- this is > generally OK though. It will NOT complain about not reformatting /home > or any other random non-system file system you might have (I do things > like have a dedicated /mp3s file system on my laptop for example). > > Unlike the *default* file system setup, which only creates /boot and / > file systems, it is *strongly* recomended to instead create separate > /boot, /, and /home file systems (at least these three -- separating > out /usr and/or /var might make sense under some situations, esp. > servers) -- this allows updates, multi-OS, and recovery without having > to make an explicit backup (although, having backups is still > recomended!). > > >> _______________________________________________ >> CentOS mailing list >> CentOS@centos.org >> http://lists.centos.org/mailman/listinfo/centos >> >> >> > > > > _______________________________________________ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos >