Writing spirals based on servo tracks of a different sample rate

A method comprising:

• writing a first spiral set starting at a first track;
• determining a radial offset;
• determining a second track based on the radial offset;
• writing a second spiral set starting at the second track;
• and
• writing servo information using the first spiral set and the second spiral set, the servo information including one or more sets of servo wedges;
• where writing a first spiral set includes writing one or more first reference spirals, where writing a second spiral set includes writing one or more second reference spirals different from the first reference spirals, and where determining a radial offset includes:
• determining a number of first reference spirals and second reference spirals associated with each set of servo wedges;
• determining a spiral velocity associated with writing the first spiral set and the second spiral set;
• and
• determining the radial offset based on the determined number and spiral velocity.

A method comprising:

• writing a first spiral set starting at a first track;
• writing a second spiral set starting at a second track different from a first track including:
• determining a radial offset using the first track, and
• determining the second track based on the radial offset;
• determining a spiral set-to-wedge ratio based on a number of spiral sets to be written;
• and
• writing servo information using the first spiral set and the second spiral set;
• where writing the one or more sets of servo wedges is based on the spiral set-to-wedge ratio;
• and
• where the radial offset corresponds to a radial distance measured along a radial line of a circular storage disk having an inner diameter and an outer diameter corresponding respectively to inner-most and outer-most radial locations at which concentric tracks are written to the circular storage disk, and determining a second track comprises determining the second track with respect to the first track to effect a predefined circumferential position of the second spiral set relative to the first spiral set after writing the first and second spiral sets to the circular storage disk.

A system comprising:

• a processor;
• a computer-readable medium operatively coupled to the processor and including instructions, which, when executed by the processor, causes the processor to perform operations comprising:
• writing a first spiral set starting at a first track;
• determining a first radial offset;
• determining a second track based on the first radial offset;
• writing a second spiral set starting at the second track;
• determining a spiral set-to-wedge ratio based on a number of spiral sets to be written;
• and
• writing servo information using the first spiral set and the second spiral set, the servo information including one or more sets of servo wedges;
• where writing the one or more sets of servo wedges is based on the spiral set-to-wedge ratio;
• and
• where the radial offset corresponds to a radial distance measured along a radial line of a circular storage disk having an inner diameter and an outer diameter corresponding respectively to inner-most and outer-most radial locations at which concentric tracks are written to the circular storage disk, and determining a second track comprises determining the second track with respect to the first track to effect a predefined circumferential position of the second spiral set relative to the first spiral set after writing the first and second spiral sets to the circular storage disk.