If a fan unit stops or the temperature in any of the three cooling zones rises above 60 C, the Controller module may, depending on a user configurable parameter (Overheat_Auto_Power_Down) use the SCI bus to power down some of the 8260 modules in the affected cooling zone in order to bring down the temperature to an acceptable level.

The setting of the Overheat_Auto_Power_Down parameter is controlled by the following DMM command:

SET OVERHEAT_AUTO_POWER_DOWN {enabledisable}

If you set this parameter to enable, the controller module will automatically power down some of the 8260 modules in the affected cooling zone in response to an overheat condition. If this parameter is disabled, the controller module will not power down any modules if the temperature rises above 60 in any of the cooling zones.

Note: Disabling the Overheat_Auto_Power_Down may result in damage to the 8260.

You can display the setting of the Overheat_Auto_Power_Down parameter using the following DMM command:

SHOW POWER MODE

An example of the output from this command is shown in Figure 62.

￿

8260> show power mode

Power Management Information

----------------------------

Hub Power Modes:

Fault-Tolerant Mode: NON_FAULT_TOLERANT

Fault-Tolerant Status: NON_FAULT_TOLERANT

Overheat Power Down Mode: ENABLE

￿8260>

Figure 62. Output from Show Power Mode Command

￿

￿

The following section describes the mechanics of the intelligent cooling subsystem:

Each of the 8260 modules can be assigned a power class. By default, the 8260 modules are shipped from the factory with a power class setting of 3.

8250 modules cannot be assigned a power class. By default, they are effectively assigned a power class of 10.

If an overheat condition is detected there is a one-minute delay and then the DMM is notified.

DMM will generate an SNMP alert as a result of receiving an over temperature notification. This alert will be displayed on the local console attached to the DMM. The alert is also sent to any SNMP manager which is defined in the community table of the DMM as a trap receiver.

If the Over_Heat Power_Down is set to Enable, (default is Disable) then the power subsystem is used to power down 8260 modules according to their

Chapter 6. 8260 Intelligent Cooling Subsystem 93

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IBM 8260 manual SET Overheatautopowerdown enabledisable, Output from Show Power Mode Command

8260 specifications

The IBM 8260 is a significant entry in the realm of enterprise servers, recognized for its performance, scalability, and robust features designed to cater to demanding business environments. It primarily serves as a high-capacity server for large organizations, capable of handling extensive workloads and complex applications without compromising speed or efficiency.

One of the standout features of the IBM 8260 is its powerful processing capabilities. It typically comes equipped with multiple processor units based on the IBM POWER architecture, which is renowned for its high-performance computing. This architecture allows the server to execute numerous simultaneous tasks, making it ideal for environments that require multitasking and high throughput.

Memory capacity is another key characteristic of the IBM 8260. Depending on the specific configuration, it can support substantial amounts of RAM, ensuring that applications can run effectively without the bottlenecks often associated with data-intensive tasks. This is crucial for enterprises that rely on real-time data analytics, large database management, and resource-heavy applications.

In terms of storage, the IBM 8260 offers flexible options. It supports a variety of storage solutions, including solid-state drives (SSDs) and traditional hard drives, catering to different performance and capacity needs. This scalability in storage helps organizations manage their data effectively while ensuring quick access and retrieval times.

Connectivity is also a prominent feature of the IBM 8260. The server includes advanced networking capabilities, supporting various protocols and technologies that facilitate fast data transfer and communication between devices. This enhances overall network performance, essential for businesses that depend on cloud computing and distributed computing environments.

Additionally, the IBM 8260 is designed with a focus on reliability and availability. It incorporates redundant components, such as power supplies and cooling systems, minimizing the risk of downtime. This is critically important for enterprises that require continuous availability of services.

The server’s management features are also noteworthy. IBM provides a suite of management tools that allow IT administrators to monitor performance, configure hardware settings, and troubleshoot issues seamlessly. This ease of management is bolstered by automation capabilities, enabling organizations to enhance operational efficiency.

In conclusion, the IBM 8260 stands out in the competitive server landscape due to its high processing power, extensive memory and storage options, advanced connectivity, reliability features, and robust management tools. Such attributes make it a viable choice for organizations seeking to enhance their IT infrastructure and streamline their operations effectively.