Installing 11g on server having 10g

Hi,
I have a Sun spark machine having Oracle Database 10g installed. For some reason i have to install Oracle Database 11g as well.
Can i go ahead with installation of 11g without uninstalling 10g? Would there be any issues other than performance(performance wil not matter much as i will stop the 10g instance).
Also are there any patches that are required for Solaris spark 64 bit machine? I mean considering 10g is already installed are there any patches requried for 11gR2.
regards,

Hi,
Yes you can follow the installation as described in below link.As said above use different ORACLE _HOME for 11g installation.
http://www.thegeekstuff.com/2008/10/oracle-11g-step-by-step-installation-guide-with-screenshots/
Best regards,
Rafi.
http://rafioracledba.blogspot.com

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