Systems and methods for efficient writing of low-RRO phase-burst servo patterns

A method for phase-burst servowriting, comprising:

• positioning a read/write head relative to a surface of a rotatable medium;
• servowriting a phase-burst pattern on the surface of the rotatable medium in one or more servowriting steps, wherein each servowriting step can include one or more revolutions, and the phase-burst pattern can include both digital information and one or more zig/zag bursts;
• and
• at each of the one or more revolutions:
• writing both a zig and a zag burst of the one or more zig/zag bursts and/or the digital information at edges of an integer cycle of a write clock;
• and
• shifting the phase of the write clock once by half clock cycle.

A system for writing phase-burst servo patterns, comprising:

• a rotatable medium including a surface having a plurality of servo tracks operable to store a phase-burst servo pattern that can include both digital information and one or more zig/zag bursts;
• a read/write head operable to write the one or more wedges;
• and
• one or more controllers operable to:
• position a read/write head relative to a surface of a rotatable medium;
• servowrite the phase-burst pattern on the surface of the rotatable medium in one or more revolutions via the read/write head;
• and
• at each of the one or more revolutions, perform at least one of:
• writing both a zig and a zag burst of the one or more zig/zag bursts together with the phase of the zig and/or the zag burst delayed or advanced by any degree relative to a write-clock;
• and
• writing the digital information with correct phase of the write clock.

A system for phase-burst servowriting, comprising:

• a rotatable medium including a surface having a plurality of servo tracks operable to store a phase-burst servo pattern that can include both digital information and one or more zig/zag bursts;
• a read/write head operable to write the one or more wedges;
• and
• one or more controllers operable to:
• position a read/write head relative to a surface of a rotatable medium;
• servowrite the phase-burst pattern on the surface of the rotatable medium in one or more servowriting steps via the read/write head, wherein each servowriting step can include one or more revolutions;
• and
• at each of the one or more revolutions:
• write each of the one or more zig/zag bursts and/or the digital information at edge of an integer cycle of a write clock;
• and
• shift the phase of the write clock once by half a cycle.