Self-Configuring SSD Multi-Protocol Support in Host-Less Environments
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Solution Overview
Problem
Current storage devices require complex and costly host operating system support for multiple protocols, leading to lengthy enumeration processes in large systems, as they are fixed with specific protocols at manufacturing and cannot change post-shipping.
Innovation Solution
Implementing self-configuring storage devices that read Vital Product Data from EEPROM to autonomously discover and configure themselves based on the chassis, enabling or disabling transport protocols as needed, thereby reducing host CPU and OS overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If storage devices are fixed with specific protocols at manufacturing, then device reliability is improved, but device adaptability deteriorates
Solution Approach 1:
The patent implements dynamic protocol configuration by allowing storage devices to change their transport protocol at runtime based on chassis detection. The device reads Vital Product Data from EEPROM to determine the appropriate protocol (SATA, SAS, or NVMe) and dynamically configures itself, transitioning from a static fixed-protocol design to a dynamic adaptive design that maintains reliability while improving adaptability.
Solution Approach 2:
The patent changes the operational parameters of the storage device by modifying the transport protocol parameter based on detected chassis type. The device reads configuration data from EEPROM and changes its protocol parameter dynamically, allowing the same hardware to operate in different protocol modes (SATA/SAS/NVMe) depending on the host environment, thus resolving the contradiction between fixed reliability and adaptive versatility.
2Adaptability or versatility
If host operating systems support multiple protocols, then device versatility is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling storage devices to automatically detect the host chassis type and configure themselves with the appropriate transport protocol without requiring host OS intervention. The device reads its configuration from EEPROM, determines the correct protocol, and configures itself autonomously, thereby reducing the complexity burden on the host operating system while maintaining multi-protocol versatility.
Solution Approach 2:
The patent applies preliminary action by pre-storing configuration information in the device's EEPROM that indicates which transport protocol should be used. This configuration is determined before the device is shipped, allowing the device to quickly self-configure upon insertion without requiring the host OS to perform complex protocol detection and configuration, thus reducing host system complexity.
3Measurement precision
If host systems perform bus enumeration for all devices, then measurement precision is improved, but time consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the transport protocol information in the device's EEPROM before shipping. This allows the device to immediately present the correct protocol interface upon insertion, eliminating the need for the host OS to perform lengthy bus enumeration to determine protocol compatibility. The device is already prepared and configured, significantly reducing enumeration time while maintaining accurate device discovery.
Data Source
AI summary
A device that may configure itself is disclosed. The device may include an interface that may be used for communications with a chassis. The interface may support a plurality of transport protocols. The device may include a Vital Product Data (VPD) reading logic to read a VPD from the chassis and a built-in self-configuration logic to configure the interface to use one of the transport protocols and to disable alternative transport protocols, responsive to the VPD.