I am working on some application where i need save some system state configuration files related to my application. So i want to save(Backup) it some where in the hard disk partition(as hidden or recovery partition) Whenever system crashes i can restore it. When System Crashes is it possible not to touch that partition while re-installing linux suse(or any other OS) and the files are still be available when the system is ready. When system Crashes or system re-install or OS change or some disaster happens the partition should not be affected.

And wanted know about reinstalling linux without affecting previous partitioning.

Welcome to LQ-

Yes by completely avoiding that partition during the fresh install.
Just make sure that you partition accordingly for your fresh install and 'not delete' it by accident.

Once your fresh installation is complete and you reboot you should be able to access it.
You can use the mount command.
https://www.lifewire.com/uses-of-lin...-mount-2201110

If you have another os installed on your machine write down those partitions so you don't delete them.

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Since you don't tell us what this "some application" is, what version/distro of Linux, how you plan on doing the restoration (automatic? Manual?), what you mean by "system crash" (hard drive failure? Or just a process crash?), etc., there's not a lot we can tell you. Read the 'Question Guidelines' link in my posting signature.

It's trivial to not format a partition when you're doing a fresh install...just don't format/mount/touch it. But we don't know if you're kickstarting a machine, and having it load automatically, recovering from a BMR image from some backup system, or copying a new VM image. We can't guess.

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If you get into the habit of planning and doing all your partitioning in advance of installing any operating system, then during installation all that's necessary is to specify which partition(s) to mount where, whether or not to use RAID or LVM, and whether or not to format. Nothing need be lost on account of a new installation unless you choose for it to be so.

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vishnusangam:

Have you been able to make progress with partitioning?