Removing the cover

To remove the cover, complete the following steps:

1.Read the safety information that begins on page v and “Installation guidelines” on page 7.

2.Turn off the server and all attached devices.

3.Disconnect all external cables and power cords.

Cover-release button

4.Press the cover-release button.

5.Slide the cover back approximately 1.27 cm (0.5 inches); then, lift it off the server.

Attention: For proper cooling and airflow, replace the cover before turning on the server. Operating the server for extended periods of time (more than 30 minutes) with the cover removed might damage server components.

Installing a memory module

The following notes describe the types of dual inline memory modules (DIMMs) that the server supports and other information that you must consider when installing DIMMs:

vThe server supports 512 MB, 1 GB, and 2 GB DIMMs, for a maximum of 8 GB of system memory. See http://www.ibm.com/servers/eserver/serverproven/compat/ us/ for a list of memory modules that you can use with the server.

vThe amount of usable memory will be reduced depending on the system configuration. A certain amount of memory must be reserved for system resources. Use the system summary in the Configuration/Setup Utility program to view the total amount of installed memory and the amount of configured memory (see “Using the Configuration/Setup Utility program” on page 26).

vThe server comes with one 512 MB DIMM installed in DIMM connector 1. Some models come with a second 512 MB DIMM installed in DIMM connector 3. If one DIMM is installed, when you install an additional DIMM, it must be installed in DIMM connector 3, and it must be the same size, speed, type, and technology as the DIMM that is installed in DIMM connector 1. You can mix compatible DIMMs from various manufacturers. The third and fourth DIMMs must be installed as a pair, in DIMM connectors 2 and 4.

vIf you install a pair of DIMMs in DIMM connectors 2 and 4, they do not have to be the same size, speed, type, and technology as the DIMMs that are installed in

Chapter 2. Installing optional devices 9

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IBM 4364, 4365 manual Removing the cover, Installing a memory module

4364, 4365 specifications

The IBM 4365 and 4364 are significant models in IBM’s lineup of mainframe computers, designed primarily for large organizations requiring robust processing capabilities. These models emerged during the late 1980s and early 1990s, serving to enhance the performance and versatility of business computing environments.

The IBM 4365, launched in 1985, is known for its sophisticated architecture and large processing power, capable of managing substantial transaction volumes. It features the advanced Multiple Virtual Storage (MVS) operating system, which allows for efficient processing and management of numerous tasks simultaneously. The MVS system contributes to high reliability and availability, factors paramount for businesses that rely on uninterrupted service.

One of the standout characteristics of the IBM 4365 is its ability to scale. Users could configure the system with multiple processors, allowing it to handle increasing workloads effectively. This scalability is made possible through its use of IBM's proprietary technology, which optimizes resource allocation to improve efficiency. The system could support an impressive number of users, making it ideal for large enterprises.

In contrast, the IBM 4364, released slightly later, is a more modest version aimed at smaller organizations but still renowned for its reliable performance. It too operates the MVS operating system, but its configurations are tailored for less intensive processing needs. It is designed with cost-effectiveness in mind, making it suitable for businesses that require robust computing without the extensive capabilities of larger systems.

Both models benefit from IBM's robust security features, ensuring data protection and compliance with industry standards. Additionally, they offer significant storage options, utilizing IBM's innovative storage technologies to retain vast amounts of data efficiently.

Among the key technologies that defined these mainframes were the use of advanced input/output capabilities and compatibility with a broad range of peripheral devices. This integration allowed organizations to enhance productivity while maintaining seamless operations across various applications.

Overall, the IBM 4365 and 4364 exemplify the evolution of mainframe technology during their era, offering remarkable processing power, superior reliability, and scalability while paving the way for future innovations in enterprise computing. Their legacy remains influential in shaping the landscape of business technology today, as organizations continue to rely on mainframe processing for critical operations.