Upgrade to Solaris S10 U8

Hello Guys.
I am new to the Solaris World, and I have a question.
I need to update to at least Solaris S10 U8.
Architecture:Sparc
Model: M8000
I have the following version installed:
Solaris 10 5/08 s10s_u5wos_10 SPARC
Copyright 2008 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 24 March 2008
Release: 5.10
Kernel architecture: sun4u
Application architecture: sparc
Hardware provider: Sun_Microsystems
Kernel version: SunOS 5.10 Generic_127127-11
What would be the best method to do this upgrade ?, are there official release docs to do this tasks. ?
Is it recommended to do an upgrade instead of a new installation ?
Thank you for your time and help.
If you require more information please let me know.
Regards.

All the docn shd be on docs.sun.com, under system admin collection , Solaris 10, install guides.
You should be able to boot from DVD and do an upgrade. I also think that installing the lastest patch cluster should be equivalent of upgrading to the Solaris 10. The main benefit of doing a clean install is that you would have your root and other OS directories under ZFS file system (rather than the UFS file system that you are probably using.) If you have existing data that needs to be preserved it would need to be on another disk(s) or backed up for a clean install IF you want to use ZFS for the OS. And, you would also need to possibly backup and then recreate all your user accounts, network settings, security settings etc. You might also want to do a clean install if your existing OS partition(s) are too small (which happens if you initially started off with Solaris 8 or 9) or if you have some system patches that did not install cleanly (and can not be uninstalled or reinstalled.)

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