Note – Using the Stop-A keyboard command to enter the OpenBoot environment during power-on or reset will immediately disable the OpenBoot environmental monitor. If you want the OpenBoot PROM environmental monitor enabled, you must reenable it prior to rebooting the system. If you enter the OpenBoot environment through any other means—by halting the operating system, by power- cycling the system, or as a result of a system panic—the OpenBoot environmental monitor will remain enabled.

Automatic System Shutdown

If the OpenBoot environmental monitor detects a critical overtemperature condition, it will initiate an automatic system power off sequence. In this case, a warning similar to the following is generated to the system console:

WARNING: SYSTEM POWERING DOWN IN 30 SECONDS!

Press Ctrl-C to cancel shutdown sequence and return to ok prompt.

If necessary, you can type Ctrl-C to abort the automatic shutdown and return to the system ok prompt; otherwise, after the 30 seconds expire, the system will power off automatically.

Note – Typing Ctrl-C to abort an impending shutdown also has the effect of disabling the OpenBoot environmental monitor. This gives you enough time to replace the component responsible for the critical condition without triggering another automatic shutdown sequence. After replacing the faulty component, you must type the env-oncommand to reinstate OpenBoot environmental monitoring.

Caution – If you type Ctrl-C to abort an impending shutdown, you should immediately replace the component responsible for the critical condition. If a replacement part is not immediately available, power off the system to avoid damaging system hardware.

OpenBoot Environmental Status Information

The OpenBoot command .env enables you to obtain status on the current state of everything of interest to the OpenBoot environmental monitor. This includes information about the system’s power supplies, fans, and temperature sensors.

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Sun Microsystems V490 manual Automatic System Shutdown, OpenBoot Environmental Status Information
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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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