Info for 60M DAT Tape?

Hi, This is in conjuction with my problem ( Archive 0 ), which was later solved as it was Tape Parameter Mismatch. Thanks for all Help. Now I have Two things Poping Upfront a. Currently I am using 60M DAT TAPE on HP-UX/9.0 For INFORMIX ON-LINE 5.01 and Tape Parameters are Block [20] Tape Size [1000000] System is Archiving Smooth with the Above parameters. My Question is, What should be the Parameters for a good performance with sufficient optimization. b. Has anyone encountered cursor jumping to an NOENTRY Field which is not supposed to be. Actually, I created a Form Using ISQL and Modified the Form Source to accomodate two fields as NOETNRY. But after I Ran the Form, I was Surprised as User can go into NOENTRY Field and can Update also. But the same if call in 4GL, INFORMIX behaves in order. Is this a Known BUG ??? I would be thankful for any sort of help in the matter. Rgds, Anand e-mail : anand@sin-co.sin-ro.dhl.com **************************************************************************** OF ALL OUR HUMAN RESOURCES, THE MOST PRECIOUS IS THE DESIRE TO IMPROVE ****************************************************************************