7

The PCM incorporates an AC inrush limit circuit and two precharge inputs (3.3V and 5V) that enable it to be hot-pluggable into a live centerplane. A current sharing scheme on the 2.0V, 3.3V, and 5V outputs enable the PCM to operate in a parallel redundant mode. A maximum of eight PCMs are used together in the redundant current sharing.

The 5V output is parallel in a system with all other PCMs and the 5V output of a peripheral power supply. The 2.0V and 3.3V outputs are parallel in a system with all other PCMs.

7.4.1 Power Requirements

In general, if a PCM fails, the system boards will continue to be powered and cooled by the other power supplies provided redundancy (an additional power supply) is present. For example, if an Enterprise system needs a minimum of three power supplies and four are present, then the system has redundancy.

However, fully configured Enterprise systems represent a different situation and are always hot-pluggable. That is, an Enterprise 5000 or 4000 system with seven or eight boards and four PCMs is hot-pluggable. (The peripheral power supply acts as the “extra” power supply.) Similarly, an Enterprise 6000 system with fifteen or sixteen boards and eight power supplies is also hot-pluggable. (Only seven PCMs are required to power sixteen active boards; the eighth PCM is “extra.” However, the eighth PCM is required for cooling purposes.) See Table 7-3.

Note – The presence of an additional (extra) PCM in the system provides redundancy and allows hot-plug of PCMs.

Power Supplies

7-9

Page 141
Image 141
Sun Microsystems 4000, 5000, 6000 manual Power Requirements

4000, 5000, 6000 specifications

Sun Microsystems, a pivotal player in the computing industry during the late 20th and early 21st centuries, was renowned for its innovative hardware and software solutions. Among its notable offerings were the Sun-6000, Sun-5000, and Sun-4000 series, powerful workstations and servers designed for a range of enterprise-level applications.

The Sun-6000 series, introduced in the early 1990s, marked a significant advancement in computing performance. These systems were built on the SPARC architecture, which facilitated high levels of processing power and multitasking capabilities. One of the main features of the 6000 series was its scalability, allowing organizations to increase their processing power by adding more modules. It also offered robust graphics performance, making it ideal for scientific visualization and complex data analysis.

Next in line was the Sun-5000 series. Launched shortly after the 6000 series, the 5000 line was celebrated for its reliability and ease of management. This series emphasized a balanced architecture, which combined processing capabilities with ample memory and storage options. Key characteristics included support for multiple processors, leading to improved performance for demanding applications. Additionally, the 5000 systems featured advanced input/output capabilities, ensuring fast data transfers—crucial for database applications and web servers.

Finally, the Sun-4000 series targeted businesses seeking affordable yet potent computing solutions. These servers boasted a modular design, allowing for easy upgrades and maintenance. The 4000 series was particularly notable for its support for various operating systems, including SunOS and Solaris. These systems were engineered to handle a range of workloads, from enterprise resource planning to web hosting, while still fitting into a value-driven budget.

Across all three series, Sun Microsystems prioritized compatibility and integration, ensuring that each system offered seamless connectivity with Sun's software solutions and third-party applications. Their commitment to open standards and interoperability set them apart in the competitive landscape of enterprise computing. Additionally, the use of high-quality components lent the systems durability, making them a wise investment for organizations looking to future-proof their IT infrastructure.

In summary, the Sun-6000, 5000, and 4000 series exemplified Sun Microsystems' ethos of innovation and reliability. These powerful systems catered to diverse business needs, setting benchmarks in performance and functionality that continue to influence modern computing.