Hi Christo I'm guessing when you talking about 64bit you mean Intel EM64T Here what oracle certification says Linux x86-64, support on AMD64/EM64T and Intel Processor Chips that adhere to the x86-64 architecture with supported Linux releases. Running Oracle 32-bit on AMD64/EM64T (64-bit OS) is not supported . I tried once to install 32bit Oracle on a 64bit OS, not very fun David Hill DBA -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Christo Kutrovsky Sent: Friday, December 09, 2005 10:46 AM To: oracle-l Subject: 32 bit oracle standby running on 64 bit linux Hello, Currently we have 32 bit linux and 32 bit Oracle 9i. My idea is to move to 64 bit in the following way: - install 32 bit Oracle software on 64 bit linux - install 64 bit Oracle software on 64 bit linux - setup standby of production using the 32 bit Oracle software on the 64 bit server - switch to this standby - shutdown, reopen with 64 bit and upgrade on the stop Do you guys know if I can have a standby of a 32 bit Oracle database on a 64 bit server running 32 bit software ? -- Christo Kutrovsky Database/System Administrator The Pythian Group -- //www.freelists.org/webpage/oracle-l CONFIDENTIALITY NOTICE This message contains confidential information intended only for the use of the individual or entity named as recipient. Any dissemination, distribution or copying of this communication by anyone other than the intended recipient is strictly prohibited. If you have received this message in error, please immediately notify us and delete your copy. Thank you. AVIS DE CONFIDENTIALITÉ Les informations contenues aux présentes sont de nature privilégiée et confidentielle. Elles ne peuvent être utilisées que par la personne ou l'entité dont le nom paraît comme destinataire. Si le lecteur du présent message n'est pas le destinataire prévu, il est par les présentes prié de noter qu'il est strictement interdit de divulguer, de distribuer ou de copier ce message. Si ce message vous a été transmis par mégarde, veuillez nous en aviser immédiatement et supprimer votre copie. Merci. -- //www.freelists.org/webpage/oracle-l