Methods, systems, and apparatuses for storing operational information related to operation of a non-volatile array are described. For example, the operational information may be stored in a in a subarray of a memory array for use in analyzing errors in the operation of memory array. In some examples, an array driver may be located between a command decoder and a memory array. The array driver may receive a signal pattern used to execute an access instruction for accessing non-volatile memory cells of a memory array and may access the first set of non-volatile memory cells according to the signal pattern. The array driver may also store the access instruction (e.g., the binary representation of the access instruction) at a non-volatile subarray of the memory array.