The term "sequential read" means blocking single-block reads. Since they are blocking they occur sequentially--thus the word sequential. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of jherrick@xxxxxxx Sent: Tuesday, March 13, 2007 6:35 AM To: oracle-l@xxxxxxxxxxxxx Subject: db file sequential read - again marked 'TABLE' in DBA_EXTENTS. I had always thought the 'sequential' event referred to index blocks -- //www.freelists.org/webpage/oracle-l