OLA/R Overview and Concepts

Planning and Preparation

question about the driver’s presence, or if you are not certain that the replacement card is identical to the existing card, you can use ioscan together with rad to investigate.

•During the replacement process, the original driver instance runs in a suspended state. I/O to the card is either queued or failed while the card is suspended. When the replacement card is brought on-line, the driver instance resumes normal operation. The driver instance must be capable of resuming and controlling the replacement card.

•If the necessary driver is not present and the driver is a dynamically loadable kernel module (DLKM), you can load it manually.

•If the driver is static and not configured in the kernel, then the card cannot be On-line Added. The card could be physically inserted on-line, but no driver would claim it.

Critical Resources

Replacing a card that is still operating can have extensive ramifications. Since power to the slot must be off when the old card is removed and the new card is inserted, the effects of shutting down the card’s functions must be considered.

This is particularly important if there is no on-line failover or backup card to pick up those functions. For example:

•Which mass storage devices will be temporarily disconnected when the card is shut down?

•Will a critical networking connection be lost?

A critical resource is one that would cause a system crash or prevent the operation from successfully completing if the resource were temporarily suspended or disconnected. For example, if the SCSI adapter to be replaced connects to the unmirrored root disk or swap space, the system will crash when the card is shut down.

During an OLA/R procedure, it is essential to check the targeted card for critical resources, as well as the effects of existing disk mirrors and other situations where a card’s functions can be taken over by another card that will not be affected.

Fortunately SMH performs a thorough critical resource analysis automatically, and presents options to you based on it’s findings. If you determine that critical resources will be affected by the procedure, you

Chapter 4

101

Page 100 Page 102
Page 101
Image 101
HP CommonIO Products manual Critical Resources
Page 100 Page 102

CommonIO Products specifications

HP CommonIO products, designed to enhance connectivity and interoperability across various platforms, are a significant innovation in the realm of information technology. They serve as a foundational layer in HP's offerings, bridging the gap between hardware components, software applications, and the overarching IT infrastructure.

One of the most prominent features of HP CommonIO products is their robust compatibility with a wide range of devices. This versatility allows businesses to integrate different hardware systems effortlessly, facilitating seamless communication and data exchange. The products are built with an open architecture, ensuring that they can accommodate both legacy systems and the latest technological advancements.

Another key characteristic of HP CommonIO products is their high-performance data handling capabilities. Equipped with advanced data processing technologies, these products can manage large volumes of data efficiently, ensuring minimal latency and maximum throughput. This is particularly beneficial for critical applications that require real-time processing and rapid responses.

Security is a top priority in today’s digital landscape, and HP CommonIO products come with built-in security features. They support advanced encryption protocols and secure access controls, providing a secure framework for data transmission and safeguarding sensitive information. This level of security is essential for organizations that need to comply with stringent regulatory standards.

Additionally, HP CommonIO products are characterized by their user-friendly interfaces and management tools. Administrators can easily configure and monitor the systems, gaining insights into performance metrics and potential issues. This intuitive management simplifies operations and reduces the administrative overhead associated with IT maintenance.

The products also leverage cutting-edge technologies such as virtualization and cloud adaptations, allowing organizations to scale their resources according to demand. This flexibility is crucial for businesses aiming to optimize costs while meeting varying workloads effectively.

In summary, HP CommonIO products are designed to deliver enhanced connectivity, robust performance, and security, making them essential tools for modern IT environments. Their compatibility with diverse systems, high throughput capabilities, secure frameworks, and user-friendly management tools collectively contribute to their effectiveness in supporting organizations’ operational goals. As businesses continue to evolve, HP CommonIO products remain at the forefront, enabling efficient and secure IT infrastructures.
Top Page Image Contents