Host-Side Multiplexer for SATA Drive Assembly Cost Reduction
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Solution Overview
Problem
Manufacturers face cost burdens and complexity in providing both low-end single-host and high-end two-host data storage systems using Serial ATA disk drive assemblies and cables, as they need to maintain two versions of disk drive assemblies and cable assemblies, which increases production, stocking, and support costs, and complicates the upgrade path from single-host to dual-host systems.
Innovation Solution
Implementing host-side multiplexer circuitry that resides on the same side as the Serial ATA cables, allowing the same set of Serial ATA devices and cables to be used in both single-host and multiple-host systems, eliminating the need for enhanced disk drive assemblies with daughter cards and complex cable assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manufacturers provide enhanced disk drive assemblies with device-side multiplexers for two-host systems, then fault tolerance and multi-host access capability are improved, but manufacturing complexity, inventory requirements, and cost burden increase
Solution Approach 1:
The patent inverts the conventional approach by placing the multiplexer on the host-side rather than the device-side. This allows a single simplified disk drive assembly to serve multiple hosts through host-side multiplexing, eliminating the need for complex device-side multiplexers while achieving the same multi-host access capability.
Solution Approach 2:
The disk drive assembly is designed to be universal and compatible with both single-host and multi-host configurations. By removing the device-side multiplexer and relying on host-side multiplexing, the same simplified assembly can be used across different system configurations, reducing manufacturing complexity and inventory requirements.
2Adaptability or versatility
If manufacturers maintain two versions of disk drive assemblies (simple and enhanced), then compatibility with different system configurations is improved, but production, stocking, and support costs increase
Solution Approach 1:
The patent creates a universal disk drive assembly that works in both single-host and multi-host configurations. By eliminating the need for device-side multiplexers and relying on host-side multiplexing, manufacturers can produce a single standardized assembly that is compatible with all configurations, significantly reducing production, stocking, and support costs.
Solution Approach 2:
The patent extracts the multiplexer function from the disk drive assembly and relocates it to the host-side. This removal of the device-side multiplexer simplifies the disk drive assembly to a standardized design that can be universally manufactured and supported, while the multiplexing capability is provided by the host system.
3Adaptability or versatility
If enhanced cable assemblies are used in low-end single-host systems, then future upgrade capability is improved, but initial system cost burden increases
Solution Approach 1:
The patent inverts the upgrade approach by providing multi-host capability through host-side multiplexing rather than requiring enhanced device-side components. This allows low-end single-host systems to use simplified cable assemblies, reducing initial cost, while upgrade capability is achieved through software or host-side hardware additions rather than replacing expensive device-side components.
Data Source
AI summary
A data storage system has a circuit board module, a set of Serial ATA devices, and a set of Serial ATA cables connecting the circuit board module to the set of Serial ATA devices. The circuit board module includes a circuit board, multiple host circuits mounted to the circuit board and multiplexer circuitry mounted to the circuit board. Each host circuit is configured to perform data storage operations on the behalf of an external client. The multiplexer circuitry is configured to (i) receive control signals from the host circuits and (ii) provide communications pathways between the host circuits and the set of Serial ATA devices in response to the control signals. Such an embodiment alleviates the need for multiple versions of disk drive assemblies and their associated costs.