Servo synchronization based on a servo synch mark that conflicts with self-clocking encoding algorithms
AssigneeWestern Digital Technologies, Inc.
InventorHanan Kupferman
Life of this patent
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Abstract
Disclosed is a rotatable media storage device (RMSD) that performs servo synchronization based on a servo synch mark (SSM) that conflicts with self-clocking encoding algorithms. The RMSD includes a disk having a plurality of tracks wherein each track comprises a plurality of data regions interspersed between servo wedges. The servo wedges comprise a servo synch mark field including a servo synch mark (SSM) and a track identification field including a track identifier (TKID). The TKID is encoded in accordance with a self-clocking encoding algorithm whereas the SSM is encoded in accordance with a second algorithm that conflicts with the self-clocking encoding algorithm of the TKID. Thus, the SSM is prevented from being decoded as a portion of the TKID.
Claims28
A rotating media storage device (RMSD) including a disk, the disk comprising:
- a plurality of tracks, each track comprising a plurality of data regions interspersed between servo wedges, the servo wedges comprising:
- a servo synch mark field including a servo synch mark (SSM);
- a track identification field including a track identifier (TKID);
- wherein the TKID is encoded in accordance with a self-clocking encoding algorithm and the SSM is encoded in accordance with a second algorithm that conflicts with the self-clocking encoding algorithm;
- and
- wherein the SSM is prevented from being decoded as a portion of the TKID.
A method for performing servo synchronization in a rotating media storage device (RMSD) including a disk having a plurality of tracks, each track comprising a plurality of data regions interspersed between servo wedges, the servo wedges including a servo synch mark field including a servo synch mark (SSM) and a track identification field including a track identifier (TKID), wherein the TKID is encoded in accordance with a self-clocking encoding algorithm and the SSM is encoded in accordance with a second algorithm that conflicts with the self-clocking encoding algorithm, the method comprising:
- monitoring for an SSM;
- and
- detecting a pattern of an SSM that conflicts with the self-clocking encoding algorithm of the TKID.
A computer system comprising a host computer and a rotating media storage device (RMSD) connected to the host computer, the RMSD comprising:
- a disk having a plurality of tracks, each track comprising a plurality of data regions interspersed between servo wedges, the servo wedges comprising:
- a servo synch mark field including a servo synch mark (SSM);
- a track identification field including a track identifier (TKID);
- wherein the TKID is encoded in accordance with a self-clocking encoding algorithm and the SSM is encoded in accordance with a second algorithm that conflicts with the self-clocking encoding algorithm;
- and
- wherein the SSM is prevented from being decoded as a portion of the TKID.
Dependencies are inferred from the claim text.