The first record to be made available to the program can be specified at run time by using the POSITION parameter on the OVRDBF CL command. For more information on this command, see the CL and APIs section of the Programming category in the IBM® i Information Center at this Web site - http://www.ibm.com/systems/i/infocenter/.
The BLOCK CONTAINS clause does not control the blocking factor.
START statements are allowed if you specify both OPTION(*BLK) and the BLOCK CONTAINS clause. The BLOCK CONTAINS clause controls the blocking factor for all files.