Multiple Oracle Instance

i am having 2 seperate Oracle 10g database servers,one is window based,second is AIX based (unix based), Can any one tell me, how can i create 2 instance for a database in unix and 2 instance for a database in windows.
what will be the command or options and recommendation/pre-request for both installation.
Regards,
M. Aamir

Hi
If you are referring databases as instances then you can simply use the GUI to create as many databases as you like. You can invoke it through command prompt by typing DBCA or you can go to
Start->Programs->Oracle-home->Config&MigTools->Database Configuration Assitant.
If you want seperate "instances" then you need to create seperate initxx.ora files with required parameters for memory etc.
If, however, you require High Availability then you should read doc on RAC. It requires shared storage (SAN or NAS) etc. You can have multiple instances for same database.
Hope it helps.
Regards
Adnan

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