The Operating System ALWAYS does the IO. Cooked, baked or RAW, might be different OS calls, but it's still an OS job to do the IO. Oracle may look like an operating system but it isn't. It's "just another" application running on the system. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Howard Latham Sent: Wednesday, March 27, 2013 9:55 AM To: rjamya; JBECKSTROM@xxxxxxxxx Cc: oracle-l-freelists; oracle-db-l Subject: RE: What does I/O on Windows Unless raw? Sent from my Windows Phone From: rjamya Sent: 27/03/2013 12:57 To: JBECKSTROM@xxxxxxxxx Cc: oracle-l-freelists; oracle-db-l Subject: Re: What does I/O on Windows I believe it is always the OS that handles the IO. Raj On Windows, does Oracle or Windows do the I/O? > -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l