Re: [linux-392] 64-bit install over 32-bit installation

From: Varun M.
Sent on: Thursday, June 19, 2008 2:27 PM
My question is how safe is it to install over a 32-bit install of CentOS 5.1 with the 64-bit install of CentOS 5.1 but still keep all the data and applications on my partitions in tact?  I'm almost positive that its safe to do going from 32-bit -> 32-bit but I'm not sure about 32-bit -> 64-bit.  Safe as in no data corruption.

Personally haven't tried that before, so can't comment on it. (thinking loud, could be wrong) Some of the apps, will have to be recompiled to work with 64-bit, faced issues with that on a desktop machine never tried for server apps. (problems with FF and Flash plugins, xmms). Also depends on what apps are you using. I think getting any specific app to work when moved from 32 to 64 might be more of a concern. You might want to let others know which apps you think might be an issue for the shift.

Some one on the list with more experience might be able to shed more light on it.

--
Regards
Varun Mehta
http://varun.cjb.net

2008/6/19 Clyde Goffe <[address removed]>:
Hey Varun,

There are 3 partitions.  There are 2 Perc 6i/e RAID controllers (one Raid-1 and one Raid-10).  LVM is configured and in use with 2 volume groups and 1 logical volume per group.  This is a server and so no dual boot. 

There's no need for new partitions.  I want to keep the ones I have if I can or as a last resort install over it. 

My question is how safe is it to install over a 32-bit install of CentOS 5.1 with the 64-bit install of CentOS 5.1 but still keep all the data and applications on my partitions in tact?  I'm almost positive that its safe to do going from 32-bit -> 32-bit but I'm not sure about 32-bit -> 64-bit.  Safe as in no data corruption.

Clyde


On Thu, Jun 19, 2008 at 1:57 PM, Varun Mehta <[address removed]> wrote:
Hey Clyde,

Can you provide more information about the setup,

How many partitions do u have?
Are they in a RAID setup?
Do u want to have a dual boot with 32 bit and 64 bit or want to port files from 32 bit to 64 bit once updated. (mount)

If you have free space on your HDD, you can boot the machine with a live CD (ubuntu has by default, not sure if other distributions have it) and use GParted. To reduce the size of the existing partition and create a new one.

http://gparted.sourceforge.net/screenshots.php

I've used it before and it's pretty reliable. You can only run it from a bootable media only, not the HDD directly (it locks the drives and does not allow editing). To be on a safer side, before you start modifying the partions, just chart out the partitions you are looking at.

--
Regards
Varun Mehta
http://varun.cjb.net

2008/6/19 Clyde Goffe <[address removed]>:

Hey All,

I'm running 32-bit version of CentOS 5.1 on one of my servers that has 2 quad core opteron processors.  I'd like to install the 64-bit version on this machine but I don't want to overwrite or corrupt my existing partitions.  Is this possible?

Clyde




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