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Old 05-31-2011, 05:04 PM
John Dalbec
 
Default RHEL5 32-to-64 upgrade?

Is there an upgrade path from 32 to 64 bit other than a complete
reinstall of the OS?

Thanks,
John Dalbec
Software Specialist 2
Youngstown State University

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Old 05-31-2011, 07:17 PM
fred smith
 
Default RHEL5 32-to-64 upgrade?

On Tue, May 31, 2011 at 01:04:21PM -0400, John Dalbec wrote:
> Is there an upgrade path from 32 to 64 bit other than a complete
> reinstall of the OS?

> Thanks,
> John Dalbec
> Software Specialist 2
> Youngstown State University

Yes, I'd like to do this, too. Advice will be appreciated by both
me AND the OP.

OTOh, if I'm forced to do a fresh install to get there, how can I
retain my existing RAID-1 setup without having to re-crete the entire
mechanism?

Specifically, I'm currently at 5.6 and will be updating, when I do it,
to 6.x.

--
---- Fred Smith -- fredex@fcshome.stoneham.ma.us -----------------------------
I can do all things through Christ
who strengthens me.
------------------------------ Philippians 4:13 -------------------------------

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Old 05-31-2011, 07:31 PM
"LaBelle, Stephen"
 
Default RHEL5 32-to-64 upgrade?

Hello,

I do not think a direct upgrade from 32-bit to 64-bit is possible?

I am not sure it even really makes sense??

Stephen L. LaBelle
Metropolitan State College of Denver
Senior System Administrator
Unix and Linux Team



-----Original Message-----
From: redhat-list-bounces@redhat.com [mailto:redhat-list-bounces@redhat.com] On Behalf Of John Dalbec
Sent: Tuesday, May 31, 2011 11:04 AM
To: redhat-list@redhat.com
Subject: RHEL5 32-to-64 upgrade?

Is there an upgrade path from 32 to 64 bit other than a complete reinstall of the OS?
Thanks,
John Dalbec
Software Specialist 2
Youngstown State University

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Old 05-31-2011, 09:32 PM
"Mr. Paul M. Whitney"
 
Default RHEL5 32-to-64 upgrade?

Do yourself a favor and plan on a re-install.


Paul


On May 31, 2011, at 1:04 PM, John Dalbec wrote:

> Is there an upgrade path from 32 to 64 bit other than a complete reinstall of the OS?
> Thanks,
> John Dalbec
> Software Specialist 2
> Youngstown State University
>
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Old 05-31-2011, 10:07 PM
Grzegorz Witkowski
 
Default RHEL5 32-to-64 upgrade?

On Tue, 2011-05-31 at 15:17 -0400, fred smith wrote:
> On Tue, May 31, 2011 at 01:04:21PM -0400, John Dalbec wrote:
> > Is there an upgrade path from 32 to 64 bit other than a complete
> > reinstall of the OS?
>
> > Thanks,
> > John Dalbec
> > Software Specialist 2
> > Youngstown State University
>
> Yes, I'd like to do this, too. Advice will be appreciated by both
> me AND the OP.
>
> OTOh, if I'm forced to do a fresh install to get there, how can I
> retain my existing RAID-1 setup without having to re-crete the entire
> mechanism?
>
> Specifically, I'm currently at 5.6 and will be updating, when I do it,
> to 6.x.
>
> --
> ---- Fred Smith -- fredex@fcshome.stoneham.ma.us -----------------------------
> I can do all things through Christ
> who strengthens me.
> ------------------------------ Philippians 4:13 -------------------------------
>

Hi,

It is not recommended to upgrade from 5.x to 6.x.
Check Installation Guide.
"Although anaconda provides an option for upgrading from earlier major
versions of Red Hat Enterprise Linux to Red Hat Enterprise Linux 6, Red
Hat does not currently support this. More generally, Red Hat does not
support in-place upgrades between any major versions of Red Hat
Enterprise Linux. (A major version is denoted by a whole number version
change. For example,Red Hat Enterprise Linux 4 and Red Hat Enterprise
Linux 5 are both major versions of Red Hat Enterprise Linux.)
In-place upgrades across major releases do not preserve all system
settings, services or custom configurations. Consequently, Red Hat
strongly recommends fresh installations when upgrading from one major
version to another."

In regards of RAID, are you talking about the software or hardware RAID?
Hardware RAID should stay intact and retain data if you will not select
to format the virtual disk when you do just a fresh install.
Anaconda should recognize all the current partitions during the install,
so you should not need even to reconfigure any of the disks/volumes if
required. I would recommend to not have any external storage attached
during reinstallation, just for the sake of the safety
In regards of the software RAID here is a nice reading: Recovery of RAID
and LVM2 Volumes http://www.linuxjournal.com/article/8874
Of course all depends on specific configuration also, so always be
prepared for the worst. Backup!

Regards,
Ges

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Old 05-31-2011, 11:55 PM
fred smith
 
Default RHEL5 32-to-64 upgrade?

On Tue, May 31, 2011 at 11:07:25PM +0100, Grzegorz Witkowski wrote:
> On Tue, 2011-05-31 at 15:17 -0400, fred smith wrote:
> > On Tue, May 31, 2011 at 01:04:21PM -0400, John Dalbec wrote:
> > > Is there an upgrade path from 32 to 64 bit other than a complete
> > > reinstall of the OS?
> >
> > > Thanks,
> > > John Dalbec
> > > Software Specialist 2
> > > Youngstown State University
> >
> > Yes, I'd like to do this, too. Advice will be appreciated by both
> > me AND the OP.
> >
> > OTOh, if I'm forced to do a fresh install to get there, how can I
> > retain my existing RAID-1 setup without having to re-crete the entire
> > mechanism?
> >
> > Specifically, I'm currently at 5.6 and will be updating, when I do it,
> > to 6.x.
<snip>
> Hi,
>
> It is not recommended to upgrade from 5.x to 6.x.
> Check Installation Guide.
<snip>
> In regards of RAID, are you talking about the software or hardware RAID?

Linux software RAID. Sorry I failed to mention that.

> Hardware RAID should stay intact and retain data if you will not select
> to format the virtual disk when you do just a fresh install.
> Anaconda should recognize all the current partitions during the install,
> so you should not need even to reconfigure any of the disks/volumes if
> required. I would recommend to not have any external storage attached
> during reinstallation, just for the sake of the safety

> In regards of the software RAID here is a nice reading: Recovery of RAID
> and LVM2 Volumes http://www.linuxjournal.com/article/8874
> Of course all depends on specific configuration also, so always be
> prepared for the worst. Backup!

Thanks for the resource pointer, I'll go read that!

--
-------------------------------------------------------------------------------
.---- Fred Smith /
( /__ ,__. __ __ / __ : /
/ / / /__) / / /__) .+' Home: fredex@fcshome.stoneham.ma.us
/ / (__ (___ (__(_ (___ / :__ 781-438-5471
-------------------------------- Jude 1:24,25 ---------------------------------

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Old 06-01-2011, 07:20 PM
Peter Skensved
 
Default RHEL5 32-to-64 upgrade?

>
> Is there an upgrade path from 32 to 64 bit other than a complete
> reinstall of the OS?
> Thanks,
> John Dalbec
>

I tried it with CentOS 5.5 once . It failed miserably - the installer
gets very confused about what packages are installed. Your best bet is
probably to do a reinstall. You don't necessarily have to do a full
wipe of your disk but it depends a bit on your layout and policies.

If you only install from RPM files and always install your own binaries
in /usr/local or /opt life is easy. Save a list of what is installed :
rpm -qa --qf "%{NAME}
" | sort | uniq > list_of_32_bit_rpm_files

Do a new 64 bit install and run the above command again :
rpm -qa --qf "%{NAME}
" | sort | uniq > list_of_64_bit_rpm_files

With a few diff, grep and cut commands you can now make lists of files
for yum to add and remove ( the uniq command above takes care of the
duplicate 64 and 32 bit names )

Do recursive diffs on /etc and a copy of your old /etc to see what
needs tinkering with. In most cases there are no changes needed for
a switch to 64 bits.

If you're brave just boot the 64 bit installer disk, stop at the disk
partitioning screen, get a shell, wipe everything except lost+found
and your own stuff ( like /home and /usr/local ) and rename /var and /etc.
Then go back to the installer, select "do not format" and proceed with the
install. That saves you the restore step.

peter
----

Peter Skensved Email : peter@SNO.Phy.QueensU.CA
Dept. of Physics,
Queen's University,
Kingston, Ontario,
Canada


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Old 06-01-2011, 07:36 PM
 
Default RHEL5 32-to-64 upgrade?

Peter Skensved wrote:
>>
>> Is there an upgrade path from 32 to 64 bit other than a complete
>> reinstall of the OS?
>
> I tried it with CentOS 5.5 once . It failed miserably - the installer
> gets very confused about what packages are installed. Your best bet is
> probably to do a reinstall. You don't necessarily have to do a full
> wipe of your disk but it depends a bit on your layout and policies.

Allow me to offer an action: my article, published in the late, lamented
SysAdmin mag, at <http://24.5-cent.us/upgrading_linux.doc>, will work just
fine.

mark

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