A disk drive is disclosed comprising a disk, a spindle motor operable to rotate the disk, a
head actuated over the disk, an interface operable to receive a host supply voltage, and a …

(57) ABSTRACT A disk drive is disclosed comprising head actuated over a disk comprising
a reference pattern. The head is positioned at a first radial location, a first phase erroris …

(57) ABSTRACT A disk drive is disclosed comprising a head actuated over a disk
comprising a plurality of non-circular servo tracks for defining a plurality of substantially …

(57) ABSTRACT A disk drive is disclosed comprising a head actuated over a disk
comprising a plurality of spiral tracks, each spiral track comprising a high frequency signal …

(57) ABSTRACT A servo writer is disclosed operable to write servo sectors on a disk to
define non-circular servo tracks. The servo writer comprises control circuitry including a …

BACKGROUND Disk drives comprise a diskanda head connected to a distal end of an
actuator arm which is rotated about a pivot by a voice coil motor (VCM) to position the head …

BACKGROUND Spinstands are used for multiple purposes With respect to disk media,
including disk media characterization, testing, and development. In order to perform such …

(57) ABSTRACT A disk drive is disclosed comprising a disk comprising a plurality of data
tracks defined by servo sectors. Each servo sector comprises a periodic preamble recorded …

Abstract Systems and methods for improving accuracy of head positioning using existing
servo patterns are provided. In one embodiment, a method for improving read head …

A data storage device is disclosed comprising a head actuated over a disk and a vibration
detector configured to generate a vibration signal in response to a vibration affecting the …