The dashed lines in FIGURE 6-3represent boundaries between FRUs. Suppose a POST diagnostic is running in the processor in the left part of the diagram. This diagnostic attempts to initiate a built-in self-test in a PCI device located in the right side of the diagram.

If this built-in self-test fails, there could be a fault in the PCI controller, or, less likely, in one of the data paths or components leading to that PCI controller. The POST diagnostic can tell you only that the test failed, but not why. So, though the POST may present very precise data about the nature of the test failure, any of three different FRUs could be implicated.

Controlling POST Diagnostics

You control POST diagnostics (and other aspects of the boot process) by setting OpenBoot configuration variables in the IDPROM. Changes to OpenBoot configuration variables generally take effect only after the machine is restarted. These variables affect OpenBoot Diagnostics tests as well as POST diagnostics.

TABLE 6-2lists the most important and useful of these variables. You can find more extensive lists and descriptions in OpenBoot PROM Enhancements for Diagnostic Operation and OpenBoot 4.x Command Reference Manual. The former is included on the Sun Fire V490 Documentation CD. The latter is included with the Solaris Software Supplement CD that ships with Solaris software.

You can find instructions for changing OpenBoot configuration variables in “How to View and Set OpenBoot Configuration Variables” on page 180.

 

TABLE 6-2OpenBoot Configuration Variables

 

OpenBoot Configuration

Variable

Description and Keywords

 

 

auto-boot

Determines whether the operating system automatically starts up. Default is true.

 

• true—Operating system automatically starts once firmware tests finish.

 

• false—System remains at ok prompt until you type boot.

auto-boot-on-

Determines whether the system attempts to boot after a nonfatal error. Default is

error?

true.

 

• true—System automatically boots after a nonfatal error if the variable

 

auto-boot?is also set to true.

 

• false—System remains at the ok prompt.

diag-level

Determines the level or type of diagnostics executed. Default is max.

 

• off—No testing.

 

• min—Only basic tests are run.

 

• max—More extensive tests may be run, depending on the device.

 

 

82 Sun Fire V490 Server Administration Guide • August 2004

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Sun Microsystems V490 manual Controlling Post Diagnostics, 2OpenBoot Configuration Variables
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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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