System and method to optimize track spacing on a rotatable media

A system to self-servo write a rotatable medium in a data storage device, comprising:

• a housing;
• a bearing connected with the housing, the rotatable medium being connected with the bearing;
• a ramp connected with the housing and arranged such that a portion of the ramp extends over an outer diameter of the rotatable medium;
• an actuator pivotably connected with the housing;
• a head operably associated with the actuator such that the head is positionable over the rotatable medium;
• and
• a disk controller electrically connected with the head, the disk controller being adapted to perform the steps of:
• positioning the head over the rotatable medium;
• acquiring an acquire track from a plurality of servo tracks on the rotatable medium using the head;
• assigning a first user track to one of the plurality of servo tracks located closer to an inner diameter of the rotatable medium than the acquire track such that a buffer exists between the first user track and the acquire track;
• assigning an inner user track to one of the plurality of servo tracks located near an inner hard stop;
• defining a first portion of a data region to be between the first user track and the inner user track;
• defining a second portion of the data region to be between the acquire track and the first user track;
• and
• writing servo data for a plurality of user tracks such that the servo data are radially spaced across the first and second portions.

A media optimized to reduce a density of a plurality of user tracks written to a surface of the media, the media being adapted to be positioned in a data storage device such that a ramp extends over a portion of the surface, the media comprising:

• a first portion having a first outer boundary at a first user track and a first inner boundary at an innermost user track;
• a second portion having a second inner boundary at a first user track and a second outer boundary nearer an outer diameter than the second inner boundary;
• and
• a plurality of servo wedges to define the plurality of user tracks, the plurality of servo wedges being radially spaced across the first and second portions;
• wherein a final user track is written to the second portion.