System-level error correction coding allocation based on device population data integrity sharing

A data storage system comprising:

• a plurality of data storage devices;
• and
• a system controller circuitry comprising memory and one or more processors and embodying one or more sequences of instructions which, when executed by the one or more processors, cause performance of:
• accessing respective data fitness information corresponding to read signal integrity for data stored on at least a subset of the plurality of data storage devices;
• determining, based at least in part on the accessed data fitness information, a type and/or amount of error correction coding (ECC) corresponding to prospective data to be stored on one or more of the plurality of data storage devices to inhibit read operation failures;
• and
• in response to a data write command from a client:
• computing ECC, according to the determined type and/or amount of ECC, for data from the write command, and
• commanding writing the data from the write command and writing the computed ECC for the data from the write command onto one or more of the plurality of data storage devices.