6947ch04.fm

Draft Document for Review April 7, 2004 6:15 pm

IBM z990 CHPID Mapping Tool (CMT)

The z990 CHPID Mapping Tool provides a mechanism to map CHPIDs onto PCHIDs as required on a z990. Additional enhancements have been built into the CMT to cater for the new requirements of the z; it provides the best availability recommendations for the installed z990 features and defined configuration.

For further details on the CMT, refer to “z990 configuration management” for a brief introduction, and to “IBM eServer zSeries Connectivity Handbook, SG24-5444, for a comprehensive explanation.

4.2.1 z990 configuration management

The architectural enhancements of the z990 enforce a new approach to configuration management. Every CHPID is mapped to a PCHID; it is mandatory that every CHPID has a PCHID associated with it. For internal channels, such as IC links, and HiperSockets, CHPIDs are not assigned a PCHID.

The z990 does not have default CHPIDs assigned to channel ports as part of the initial configuration process. CHPIDs are assigned to physical channel path identifiers (PCHIDs) in the IOCP input file. It is the customer’s responsibility to perform these assignments by using the HCD/IOCP definitions or by importing the output of the CHPID Mapping Tool.

It is recommended that the CMT be used for all new build z990 configurations, or when upgrading from a z900. It can also be used as part of standard hardware changes to your installed z990.

The Channel Mapping Tool takes input from two sources:

1.The Configuration Report file (CFreport) produced by the IBM order tool (e-Config) can be obtained from your IBM representative, or the Hardware Configuration File produced by IBM manufacturing can be obtained from IBM Resource Link.

2.An IOCP statement file.

The following output is produced by the CMT:

￿Tailored reports. All reports should be saved for reference. The Port Report sorted by CHPID number and location should be supplied to your IBM hardware service representative for the z990 installation.

￿An IOCP input file with PCHIDs mapped to CHPIDs. This IOCP input file can then be migrated back into HCD from which a production IODF can be built.

Important: When an IOCP statement file is exported from a Validated Work IODF using HCD, it must be imported back to HCD for the process to be valid. The IOCP file cannot be used directly by the IOCP program.

The configuration management process is reflected in Figure 4-5 on page 117.

116IBM eServer zSeries 990 Technical Guide

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IBM manual 1 z990 configuration management, IBM z990 Chpid Mapping Tool CMT

990 specifications

The IBM 990 series, often referred to in the context of IBM's pioneering efforts in the realm of mainframe computing, represents a unique chapter in the history of information technology. Introduced in the late 1960s, the IBM 990 series was designed as a powerful tool for enterprise-level data processing and scientific calculations, showcasing the company's commitment to advancing computing capabilities.

One of the main features of the IBM 990 was its architecture, which was built to support a wide range of applications, from business processing to complex scientific computations. The system employed a 32-bit word length, which was advanced for its time, allowing for more flexible and efficient data handling. CPUs in the IBM 990 series supported multiple instructions per cycle, which contributed significantly to the overall efficiency and processing power of the machines.

The technology behind the IBM 990 was also notable for its use of solid-state technology. This provided a shift away from vacuum tube systems that were prevalent in earlier computing systems, enhancing the reliability and longevity of the hardware. The IBM 990 series utilized core memory, which was faster and more reliable than the magnetic drum memory systems that had been standard up to that point.

Another defining characteristic of the IBM 990 was its extensibility. Organizations could configure the machine to suit their specific needs by adding memory, storage, and peripheral devices as required. This modular approach facilitated the growth of systems alongside the technological and operational demands of the business environments they served.

In terms of software, the IBM 990 series was compatible with a variety of operating systems and programming environments, including FORTRAN and COBOL, enabling users to access a broader array of applications. This versatility was a significant advantage, making the IBM 990 an appealing choice for educational institutions, research facilities, and enterprises alike.

Moreover, the IBM 990 was engineered to support multiprocessing, which allowed multiple processes to run simultaneously, further increasing its effectiveness in tackling complex computing tasks.

In summary, the IBM 990 series represents a significant advancement in computing technology during the late 20th century. With a robust architecture, versatile configuration options, and a focus on solid-state technology, the IBM 990 facilitated substantial improvements in data processing capabilities, making it a cornerstone for many businesses and academic institutions of its time. Its impact can still be seen today in the continued evolution of mainframe computing.