XOR-based scrambler/descrambler for SSD communication protocols

A system for descrambling and scrambling data transmitted via a memory channel of a memory device coupled to a host system, comprising:

• a storage device driver installed on the host system that executes a training mode for the memory device to discover XOR vectors used by the host system to scramble data by:
• inputting all zero training data to a scrambling algorithm for all memory locations of the memory device to generate scrambled training data that is transmitted over the memory channel to the memory device, such that the scrambled training data are equal to the XOR vectors corresponding to those memory locations;
• and
• a storage controller on the memory device configured to:
• receive the scrambled training data over the memory channel and store the scrambled training data as the XOR vectors for each of the corresponding memory locations;
• and
• after the training mode and during a functional mode of the memory device, receive scrambled data over the memory channel for a specified memory location, and use an XOR vector of the XOR vectors stored for the specified memory location to descramble the scrambled data prior to writing to the specified memory location.

An executable software product stored on a non-transitory computer-readable storage medium containing program instructions for descrambling and scrambling a data transmitted on a memory channel of a memory device coupled to a host system, the program instructions for:

• executing a training mode for the memory device to discover XOR vectors used by the host system to scramble data by:
• inputting all zero training data to a scrambling algorithm for all memory locations of the memory device to generate scrambled training data that is transmitted over the memory channel to the memory device, such that the scrambled training data are equal to the XOR vectors corresponding to those memory locations;
• receiving the scrambled training data over the memory channel by the memory device and storing the scrambled training data as the XOR vectors for each of the corresponding memory locations;
• and
• after the training mode and during a functional mode of the memory device, receiving, by the memory device, scrambled data over the memory channel for a specified memory location, and using an XOR vector of the XOR vectors stored for the specified memory location to descramble the scrambled data prior to writing to the specified memory location.