Centralized Real-Time Clock Synchronization in Modular Systems
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Solution Overview
Problem
In modular information handling systems, synchronizing and managing real-time clocks across multiple components is challenging due to the evolution of BIOS requirements and the need for battery backup in real-time clocks, leading to increased costs and servicing complexities.
Innovation Solution
An information handling system comprising a processor, access controller, and basic input/output system, where the access controller communicates with a network to retrieve real-time data and writes it to the real-time clock during power-on/self-test, and the BIOS reads and writes real-time data to the real-time clock, facilitating synchronization across components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time clock is implemented in each modular information handling system, then accurate timekeeping is achieved, but system complexity and battery backup requirements increase
Solution Approach 1:
The patent merges the real-time clock functionality from individual modular information handling systems into a centralized chassis management controller. This consolidation reduces the number of separate RTC components from multiple modules to a single centralized RTC, thereby reducing overall system complexity while maintaining accurate timekeeping across all modules through centralized time distribution.
Solution Approach 2:
The chassis management controller is designed to serve multiple functions: it manages power distribution, monitors system status, and provides centralized real-time clock functionality to all modular information handling systems. This multi-functional approach eliminates the need for separate battery-backed RTCs in each module, reducing both complexity and battery backup requirements while maintaining reliable timekeeping.
2Reliability
If battery backup is provided for real-time clock, then timekeeping continuity is ensured, but cost and servicing complexity increase
Solution Approach 1:
The patent extracts the battery backup requirement from individual modular information handling systems and consolidates it into the chassis management controller. By removing the need for separate battery-backed RTCs in each module and replacing them with a centralized RTC in the chassis management controller, the solution reduces manufacturing costs and servicing complexity while ensuring timekeeping continuity through the single centralized battery backup.
3Ease of operation
If multiple real-time clocks are distributed across modular systems, then local timekeeping is achieved, but synchronization difficulty increases
Solution Approach 1:
Instead of having each modular information handling system maintain its own independent real-time clock and attempting to synchronize them, the patent inverts the approach by having a single centralized real-time clock in the chassis management controller provide time to all modules. This inversion from distributed to centralized timekeeping eliminates synchronization complexity while ensuring all modules have access to accurate, synchronized time.
Data Source
AI summary
In accordance with embodiments of the present disclosure, an information handling system may include a processor, an access controller, a real-time clock, and a basic input/output system. The access controller may be communicatively coupled to the processor and configured to execute a client for retrieving real time via a network communicatively coupled to the access controller. The real-time clock may be communicatively coupled to the access controller. The basic input/output system may be embodied in one or more instructions readable and executable by the processor and configured to, during a power-on/self-test of the basic input/output system, read real time from the access controller and write the real time to the real-time clock.