Method and disk apparatus for automatically adjusting a head pos

Details Method and disk apparatus for automatically adjusting a head pos Method and disk apparatus for automatically adjusting a head pos

1994-12-19

1997-03-18

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, G11B 15584, G11B 2102

Patent

active

056128355

ABSTRACT:
A disk apparatus includes a head, a motor for moving the head to a track position on a disk in response to a motor driving signal, a driving-signal generating section for issuing the motor driving signal to the motor in response to each of an external drive instruction from a host, a first drive instruction and a second drive instruction, each of which includes data indicative of the number of tracks for the head to be moved and data indicative of a direction for the head to be moved to, a detector for detecting that the disk is inserted, a first instruction generating section for issuing the first drive instruction such that the head is positioned on a track 0 position of the disk when the detector detects that the disk is inserted, a first counter for summing the number of tracks of each of the external, first and second drive instructions in consideration of the direction, and a second counter for summing the number of tracks of the external drive instruction in consideration of the direction, a second instruction generating section for issuing the second drive instruction such that a value of the first counter becomes equal to that of the second counter when the head is moved to the track 0 position.

REFERENCES:
patent: 4924333 (1990-05-01), Hamaoka
patent: 5357384 (1994-10-01), Tsuyuguchi et al.
patent: 5371724 (1994-12-01), Uno
patent: 5434724 (1995-07-01), Shoji et al.
3.5" Floppy Disk Drive (FD1139H) Product Description 806-521431-0, NEC Corporation, Jan. 1993.

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