Time tracking with patrol scrub

A method comprising:

• capturing, by a timestamp circuitry, a current timer index from a timer circuitry in response to an initiation of a periodic patrol scrub;
• comparing, by the timestamp circuitry, the current timer index to a stored timestamp;
• updating, by a demarcation voltage (VDM) selection circuitry, a state of a sub-block of a memory array, if the state is less than a threshold and a difference between the current timer index and the stored timestamp is nonzero;
• and
• storing, by the timestamp circuitry, the current timer index as a new timestamp.

A time tracking system comprising:

• a processor circuitry;
• a memory array;
• and
• a memory controller comprising:
• a memory controller memory,
• a timestamp circuitry to capture a current timer index from a timer circuitry in response to an initiation of a periodic patrol scrub and to compare the current timer index to a stored timestamp;
• and
• a demarcation voltage (VDM) selection circuitry to update a state of a sub-block of a memory array, if the state is less than a threshold and a difference between the current timer index and the stored timestamp is nonzero,
• the timestamp circuitry further to store the current timer index as a new timestamp.