BIOS Memory Overlay for Faulty DIMM Initialization
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Solution Overview
Problem
Conventional information handling systems halt initialization when faulty or unavailable Dual Inline Memory Modules (DIMM) devices are detected, requiring users to physically replace them, which is inconvenient, especially for less expensive computing devices lacking advanced memory controller features.
Innovation Solution
An Information Handling System (IHS) that includes a processing system with a memory system capable of identifying unavailable DIMM devices during initialization and generating a memory overlay to hide them from the memory controller, allowing the system to complete initialization and enter a runtime environment without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system halts initialization when unavailable memory devices are detected, then system reliability is maintained, but ease of operation deteriorates as users must physically replace faulty DIMM devices
Solution Approach 1:
The patent replaces the mechanical approach of physically removing faulty DIMM devices with a software-based solution. The BIOS engine creates a memory overlay that virtually masks unavailable memory devices, allowing the system to initialize and operate without physical hardware changes. This substitution of mechanical replacement with software virtualization resolves the contradiction by maintaining reliability while dramatically improving ease of operation.
Solution Approach 2:
The patent introduces a memory overlay as an intermediary layer between the unavailable memory devices and the memory controller. This overlay acts as a mediator that redirects memory access away from faulty DIMM devices, allowing the system to operate reliably without requiring physical removal of the problematic hardware, thus improving ease of operation while maintaining system reliability.
2Ease of operation
If expensive hardware upgrades with advanced memory controller features are implemented, then ease of operation improves by enabling Fault Resilient Booting, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex hardware-based Fault Resilient Booting capabilities with a software-based memory overlay approach implemented in the BIOS engine. Instead of requiring expensive memory controllers with built-in fault tolerance features, the solution uses software to achieve the same operational result, thereby improving ease of operation while reducing device complexity and cost.
Solution Approach 2:
The patent employs a software-based memory overlay that can be dynamically created and modified without requiring permanent hardware changes. This approach uses inexpensive software resources rather than expensive hardware upgrades, achieving Fault Resilient Booting functionality in less expensive computing devices without increasing device complexity.
3Manufacturing precision
If the system requires physical replacement of unavailable DIMM devices, then manufacturing precision is maintained by ensuring only functional hardware is used, but loss of time increases due to user intervention requirements
Solution Approach 1:
The patent performs preliminary identification and masking of unavailable memory devices during the initialization phase before the system becomes fully operational. The BIOS engine detects faulty DIMM devices and creates a memory overlay to mask them, allowing the system to boot and operate without requiring users to physically replace the faulty hardware, thereby reducing time loss while maintaining manufacturing precision through software-based fault management.
Solution Approach 2:
The patent replaces the time-consuming mechanical process of physical DIMM device replacement with an automated software-based memory overlay approach. The BIOS engine automatically identifies unavailable devices and creates virtual masking, eliminating the need for user intervention and physical hardware changes, thus significantly reducing time loss while maintaining system integrity.
4Measurement precision
If initialization operations are halted for unavailable memory devices, then measurement precision of system state is maintained by accurately detecting faults, but productivity deteriorates due to incomplete initialization
Solution Approach 1:
The patent introduces a memory overlay as an intermediary that allows initialization operations to continue despite the presence of unavailable memory devices. The overlay mediates between the memory controller and faulty DIMM devices, redirecting access away from unavailable regions, thereby maintaining measurement precision through accurate fault detection while improving productivity by enabling complete system initialization.
Solution Approach 2:
The patent replaces the conventional approach of halting initialization upon detecting unavailable memory devices with a software-based memory overlay mechanism. This substitution allows the system to maintain accurate fault detection (measurement precision) while continuing initialization operations (productivity), enabling the system to boot and operate with faulty hardware present.
Data Source
AI summary
An unavailable memory device initialization system includes a memory controller device that is configured to determine whether a memory system includes unavailable memory devices during initialization operations. During the first initialization operations, a BIOS engine identifies unavailable memory device(s) in the memory system that were determined to be unavailable by the memory controller device during the first initialization operations and, in response, stores respective unavailable memory device identifier(s) associated with each unavailable memory device in a non-volatile storage subsystem. Subsequently, during second initialization operations and based on the respective unavailable memory device identifier(s) stored in the non-volatile storage subsystem, the BIOS engine generates a memory overlay that hides each unavailable memory device from the memory controller device such that the memory controller device determines that the memory system does not include any unavailable memory devices during the second initialization operations.