Western Digital Technologies, Inc.

So Ogiwara

Hideki Zaitsu

Weldon Mark Hanson

Niranjay Ravindran

Alain Chahwan

Kei Yasuna

Toshihisa Komai

Shuji Nishida

Yoshio Soyama

Various illustrative aspects are directed to a data storage device, method, and one or more processing devices that are configured to: determine an initial track pitch based on a performance metric determined for the head; determine a track pitch adjustment based on a measure of servo pattern distortion associated with a region of the disk; and set a final track pitch for the region of the disk based on the track pitch adjustment and the initial track pitch.

Data storage device with track pitch determination for mitigating effects of servo pattern distortion

A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of data tracks, including consecutive data tracks N&#x2212;1 and N. A first write to data track N is performed using a first position error signal (PES) representing a position of the head relative to the data tracks. A track squeeze metric is generated for data track N&#x2212;1 based on at least the first PES of the first write. The track squeeze metric for data track N&#x2212;1 is accumulated during the first write, and the first write is aborted when the accumulated track squeeze metric for data track N&#x2212;1 exceeds a first threshold.

Data storage device aborting write operation based on accumulated track squeeze metric for adjacent data track

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Yokohama, Japan

So Ogiwara