Disk drive control for inhibiting operation upon battery voltage

Details Disk drive control for inhibiting operation upon battery voltage Disk drive control for inhibiting operation upon battery voltage

1984-07-05

1987-08-25

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

360 741, 360 75, G11B 1904, G11B 1902

Patent

active

046896988

ABSTRACT:
An apparatus for driving a magnetic disk for information storage and retrieval, comprising a battery for supplying electric power to a first actuator for rotating the magnetic disk, and to a second actuator for moving a magnetic head across a surface of the magnetic disk and energizing the head to write information on and read the information from the magnetic disk. The apparatus further comprising a detector for sensing a voltage level of the battery, and generating a voltage-drop signal when the voltage level of the battery has fallen below a preset limit. A control unit is provided for controlling the first and second actuators. The control unit is responsive to the voltage-drop signal to inhibit the starting of an access to the magnetic disk, or inhibit the operation of the first actuator.

REFERENCES:
patent: 3956740 (1976-05-01), Jones et al.
patent: 4461003 (1984-07-01), Tamaki
IEEE Transaction on Magnetics, vol. Mag.-14, No. 4, "Microprocessor Applications in Disk Storage Systems", Johann, 7/78, pp. 203-206.

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