The power supplies provide 48-volt and 5-volt standby outputs to the system. The 48-volt output powers point-of-load DC/DC converters that provide 1.5V, 1.8V, 2.5V, 3.3V, 5V, and 12V to the system components. Output current is shared equally between both supplies via active current-sharing circuitry.

Power supplies in a redundant configuration feature a hot-swap capability. You can remove and replace a faulty power supply without shutting down the operating system or turning off the system power. For additional details, see “About Hot- Pluggable and Hot-Swappable Components” on page 26.

Each power supply has separate status LEDs to provide power and fault status information. For additional details, see “How to Isolate Faults Using LEDs” on page 172.

Configuration Rule

■Good practice is to connect each power supply to a separate AC circuit, which will maintain N+1 redundancy and enable the system to remain operational if one of the AC circuits fails. Consult your local electrical codes for any additional requirements.

Caution – If any power supply fails, leave the supply in its bay until you are ready to install a replacement.

For information about installing power supplies, see the Sun Fire V490 Server Parts Installation and Removal Guide, which is included on the Sun Fire V490 Documentation CD.

About the Fan Trays

The basic system is equipped with five fans mounted on two fan trays, providing front-to-rear cooling: Fan Tray 0, which holds three fans that cool the CPUs, and Fan Tray 1, which holds two fans that cool the FC-AL drives and PCI cards. Fan Tray 0 is accessible from the front of the system, while Fan Tray 1 requires that you remove the system’s PCI access panel to gain access to it. Power supplies are cooled separately, each with its own internal fans.

Chapter 3 Hardware Configuration 39

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Sun Microsystems V490 manual About the Fan Trays, Configuration Rule
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V490 specifications

Sun Microsystems V490 is a robust, high-performance server that was launched in the mid-2000s. It is part of Sun's Enterprise line of servers, specifically designed to meet the needs of businesses requiring reliability, scalability, and efficiency in their computing environments. The V490 is well-regarded for its versatility and ability to handle demanding applications.

At the heart of the V490 is its support for the UltraSPARC IV processor. The server can be configured to contain up to four processors, allowing it to deliver exceptional parallel processing capabilities. The UltraSPARC IV architecture enhances throughput and efficiency, making it suitable for enterprise applications and database management tasks.

One of the standout features of the V490 is its memory capacity. The server can support up to 64 GB of RAM, which allows for extensive caching and improved performance for memory-intensive applications. Coupled with a high bandwidth architecture, the V490 ensures that data can be processed quickly and effectively.

The V490 also emphasizes storage flexibility. It comes equipped with multiple disk drive bays, allowing for a combination of SATA and SAS drives. This flexibility enables businesses to tailor their storage solutions according to their specific performance and redundancy requirements. The V490 supports hot-swappable drives, making maintenance and upgrades considerably easier without taking the server offline.

In terms of connectivity, the Sun V490 features a variety of networking options. It includes multiple Gigabit Ethernet ports, ensuring high-speed data transfer and redundancy. Additionally, the server supports advanced input/output capabilities, making it compatible with various peripherals and external storage solutions.

Sun Microsystems V490 runs on the Solaris operating system, known for its stability and security. This OS enhances the server's performance while providing a reliable platform for mission-critical applications. The V490 also supports virtualization technologies, allowing organizations to run multiple operating systems and applications on a single hardware platform, thus optimizing resource utilization.

Another key characteristic of the V490 is its thermal efficiency. The server is designed with an advanced cooling system that minimizes energy consumption while maximizing performance. This focus on power efficiency aligns with modern data center requirements for sustainability and reduced operational costs.

In summary, the Sun Microsystems V490 is a powerful enterprise server that combines the latest processing technologies, substantial memory and storage capabilities, and robust networking options. Its scalability, along with advanced virtualization support and energy-efficient design, makes it a suitable choice for organizations looking to enhance their IT infrastructure. The V490 remains a testament to Sun Microsystems' commitment to delivering high-quality, reliable computing solutions.
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