Systems and methods for encoding identifying information on a surface of a rotatable medium
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorFernando Zayas
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Abstract
Systems and methods in accordance with embodiments of the present invention can be applied to encode non-servo information on a rotatable medium connected with a data storage device. For example, such information can describe the data storage device and can include a serial number, component information, manufacturing date, etc. The non-servo information can comprise at least one burst within a servo burst pattern. In an embodiment, the at least one burst can be positioned in a portion of the burst pattern preceding a track where user data is not intended to be stored. In other embodiments, each burst from the servo burst pattern can be demodulated as two bursts, one of which can include non-servo information.
Claims23
A burst pattern for positioning a head on a reference surface of a rotatable medium for use in a data storage device, comprising:
- a plurality of servo bursts arranged in a plurality of burst columns of a servo wedge;
- a track centerline defined by a servo burst from two or more of the plurality of burst columns;
- wherein at least one of the burst columns is not used to define the track centerline;
- and
- wherein the at least one burst column includes a servo burst representing non-servo information.
A burst pattern for positioning a head on a reference surface of a rotatable medium for use in a data storage device, comprising:
- a plurality of servo bursts arranged in a plurality of burst columns of a servo wedge;
- wherein a servo burst from two or more of the burst columns is arranged to produce a position error signal when read by the head;
- wherein at least one burst column is not used to define the track centerline;
- and
- wherein a servo burst from said at least burst column includes non-servo information.
A method to encode information in a servo pattern on a rotatable medium in a data storage device having a head to access the rotatable medium, comprising:
- selecting a rotatable medium;
- writing a servo pattern on at least one surface of the rotatable medium to determine a position of the head along the at least one surface, the servo pattern including one or more servo wedges, each servo wedge having a burst pattern to calculate a position error signal when the burst pattern is read by the head, the burst pattern including a plurality of burst columns;
- defining a track centerline within the burst pattern using two or more of the burst columns;
- and
- encoding non-servo information in one or more of the burst columns not defining the track centerline.
Dependencies are inferred from the claim text.