Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1999-03-18
2000-10-03
Faber, Alan T.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7806, 360 7808, 360 7814, G11B 5596
Patent
active
061281549
ABSTRACT:
A servo control method of a hard disk drive includes: providing a disk having a plurality of first servo track patterns, including a gray code field, for providing track information for each track, and a plurality of second servo track patterns which fail to include the gray code field of the first servo track patterns, both the first and second track patterns being positioned on the same track; providing a head for reading data from a given track of the disk or writing data on the given track; checking, in response to a data read/write command received from a host computer, whether or not the head must move to a target track; if it is determined that the head must move to the target track, repeatedly switching from one head to a following head, in a sequential manner, to perform a track seek; after performing the track seek, checking whether or not a velocity of the head is decreasing; and, if it is determined that the velocity of the head is decreasing, fixing the head on the disk including the target track to perform track following.
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Bushnell Esq. Robert E.
Faber Alan T.
Samsung Electronics Co,. Ltd.
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