Dynamic track interference write counting for magnetic disks

A method for counting writes to zones of tracks on one or more disks of a Data Storage Device (DSD), the method comprising:

• receiving a write command to write data in a target zone of one or more tracks on a disk of the one or more disks;
• incrementing a segment write count in a data structure for a segment in a track in the target zone to account for performance of the write command in the segment;
• using the data structure to determine whether the incremented segment write count is a highest segment write count from among segment write counts in the data structure;
• and
• incrementing a current overall Track Interference (TI) write count for the target zone in response to determining that the incremented segment write count is the highest segment write count in the data structure.

A Data Storage Device (DSD), comprising:

• one or more disks, wherein each disk of the one or more disks includes at least one recording surface configured to store data in a plurality of tracks on the at least one recording surface;
• one or more heads configured to write data on a respective recording surface of the one or more disks;
• a memory configured to store at least one data structure configured to count writes performed in a track of the plurality of tracks;
• means for receiving a write command to write data in a target zone including one or more tracks on a recording surface of the one or more disks;
• means for controlling a head of the one or more heads to write the data for the write command in the target zone;
• means for determining whether a data structure is stored in the memory for counting writes performed in a track of the target zone;
• and
• in response to determining that a data structure is not stored in the memory for counting writes performed in a track of the target zone, means for creating at least one Low Repeat Write (LRW) data structure for the target zone configured to count writes in different sectors of respective tracks of the target zone since the creation of the at least one LRW data structure.