>>>See here: >>>http://download-west.oracle.com/docs/cd/B10501_01/server.920/ >>>a96536/ch43.htm#287916 >>> >>>The limit is 2^22 -1 , not 2^21 - 1. >>>The reason I say "around" is that I'm not game to argue the aaaaaaaaaaaargh, yes, of course, so sorry. a dba is 10bits for which file and 22 (-1) for block offset. Dang the memory! Sorry for the snafu...and yes, 30GB is almost 31.99999237060546875GB ((((2^22)-1)*8KB)/1GB) :-) -- //www.freelists.org/webpage/oracle-l