Mark Mielke wrote:
Is there anything in POSIX that seems to suggest this? :-) (i.e. why are you going under the assumption that the answer is yes - did you read something?)
Perhaps it was just this: http://kevinclosson.wordpress.com/2007/01/18/yes-direct-io-means-concurrent-writes-oracle-doesnt-need-write-ordering/ Whichof course isn't on Sun.