Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1997-09-24
2000-10-10
Klimowicz, William
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7707, G11B 5596
Patent
active
06130798&
ABSTRACT:
In the disk controller in a hard disk system, the microcontroller is an integral part of the servo positioning system. The servo positioning system is the system responsible for positioning the read/write heads. This involves moving the read/write heads from track to track and holding the head in place as data is read or written. A time and calculation intensive portion of the control algorithm is the calculation of the position error signal, which represents the degree to which the actual position of the head varies from the desired position. A hardware position error signal circuit is provided to calculate this signal, thus freeing microprocessor bandwidth for other tasks and facilitating a more stable controller. Furthermore, a circuit for adjusting erroneous cylinder numbers is provided.
REFERENCES:
patent: 5760990 (1998-06-01), Ukani et al.
patent: 5818659 (1998-10-01), Cheung et al.
patent: 5828516 (1998-10-01), Park
Chang Dar-Der
Wong Richard K.
Klimowicz William
Seagate Technology LLC
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