Storage Device EOM Operation for Signal Quality Assessment
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Solution Overview
Problem
As data transmission speeds increase, the time required to measure the eye of a signal in storage devices becomes a limiting factor, affecting overall data transmission efficiency.
Innovation Solution
A storage device that performs an eye open monitor (EOM) operation upon power-on, generates an EOM result value, and outputs it to a host device in response to an asynchronous event request (AER) command, thereby enhancing signal quality and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the storage device performs EOM operation in real-time during data transmission, then signal quality assessment is improved, but data transmission speed is limited due to measurement time
Solution Approach 1:
The storage device performs the EOM operation during the power-on initialization phase before normal data transmission begins. This preliminary measurement of signal quality characteristics (eye diagram parameters) is completed in advance, allowing the device to be ready for high-speed data transmission without real-time measurement delays. The EOM result value is stored and can be used for subsequent transmission optimization.
2Loss of time
If the storage device performs EOM operation upon power-on, then measurement time is reduced, but signal quality assessment accuracy may be affected by initialization conditions
Solution Approach 1:
The storage device uses the EOM result value obtained during power-on as feedback to adjust transmission parameters. The host device receives this pre-measured signal quality information and can optimize transmission settings accordingly. This feedback mechanism ensures that even though measurement occurs during initialization, the system compensates by adjusting operational parameters to maintain assessment accuracy during actual data transmission.
Data Source
AI summary
A storage system may include a host device, and a storage device. The storage device may be configured to, being powered-on, perform an eye open monitor (EOM) operation with respect to a signal received from the host device to generate an EOM result value, configured to store the EOM result value in a buffer memory, and configured to output the EOM result value in the buffer memory to the host device in response to receiving an asynchronous event request (AER) command from the host device.