Separator Page Differences, Output Disposition

10.3.4.4 Printer Forms Alignment via PSETUP

The PSETUP function is not supported in JES2. See 10.1.1.4, ªPrinter Forms Alignment via PSETUPº on page 208 for some alternatives.

10.3.4.5 Separator Page Differences

The IBM provided separator pages are different with JES2. See 10.1.1.5, ªSeparator Page Differenceº on page208 for more information.

10.3.4.6 End-of-page Sensing

JES2 does not support end-of-page sensing. See 10.1.1.6, ªEnd-of-page Sensingº on page 209 for more information.

10.3.4.7 Output Disposition

Conditional processing of output groups can be specified separately for normal and abnormal job termination. Use the // OUTPUT OUTDISP= statement with the same terms familiar to the VSE user (WRITE, HOLD, KEEP, LEAVE, PURGE). It can also be specified in JES2 initialization parameters on a job class or output class basis.

10.3.4.8 FCB Naming Differences

Both POWER and JES2 use eight-character FCB (Forms Control Buffer) names. Both also use four-character prefixes dependent on the printer device type. However, the prefixes are not similar, and the way they are specified is different.

FCB Prefixes

The four-character prefix of the FCB name is based on the device type and differs between POWER and OS/390.

Table 14. FCB Name Prefixes

Printer Device	VSE/POWER	OS/390

3203-1	FCB3	FCB2

3203-5	FCB2	FCB2

3211	FCB2	FCB2

3262-5	FCB2	FCB4

3800	FCB1	FCB3

4245	FCB2	FCB2

4248	FCB5	FCB4

5203	FCB4	FCB2

6262-14	FCB2	FCB4

PRT1	FCB2	FCB2

Device	$$$$	n/a
independent

Note: The IBM 3262-5 and 4248 printers can also be run in 3211 compatibility mode, and use the FCB2 prefix.

Chapter 10. POWER and JES2 217

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.

IBM OS/390 Separator Page Differences, Output Disposition, FCB Naming Differences, FCB Prefixes

Models: OS/390