----------------------------------- Study Guide for MVS JCL Chapter Two ----------------------------------- Be familiar with the Concepts and Vocabulary: Section 2.1 Skim the Hardware Architecture history: 2.2 Understand Data Records: 2.3.2 - (logical) records - types of records - blocking (why?) Data Storage: 2.4 - DASD "Direct-access storage devices are like the hard disk on a PC, but much larger. A single DASD volume can contain as many as 9GB." [Maybe that was impressive in 1998. I have a pair of 18GB drives on my PC at home. -ed.] - TAPES