Magnetic disk protection mechanism, computer system comprising protection mechanism, protection method for magnetic disk, and program for protection method
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsSusumu Shimotono, Tetsuya Noguchi, Mitsuru Ogawa, Akiyoshi Tanaka
Life of this patent
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Abstract
A mechanical transport device includes a system for transport; and a hard disk drive attached to the system. The hard disk drive comprises a magnetic recording disk to record data, a head to read or write the data to or from the disk, and a drop sensor designed to sense a shock condition. The system for transport may be a vehicle such as a car. Additional systems are also presented
Claims22
A mechanical transport device comprising:
- a system for transport;
- and
- a hard disk drive data storage system attached to said transport system, wherein the hard disk drive data storage system comprises:
- a magnetic recording disk to record data;
- a head to read or write the data to or from the disk;
- and
- a sensor designed to sense a shock condition,
- wherein the hard disk drive data storage system performs at least one of the following operations upon detecting a shock condition:
- dividing an access request to said magnetic disk device into access requests with a smaller data size per access, and
- causing the head to escape from the disk, wherein if a shock actually occurs after the head has been instructed to escape, determining whether or not the magnetic head has escaped before the occurrence of the shock.
A system for reading or writing data comprising:
- a hard disk drive including:
- a magnetic recording disk to record data;
- a head to read or write the data to or from the disk;
- and
- a shock sensor designed to sense a shock condition;
- and
- wherein the shock sensor senses the shock condition based on a shock value being over a predetermined threshold level,
- wherein the shock value is determined by combining values of a linear accelerometer and an angular speed sensor.
A system for reading or writing data comprising:
- a hard disk drive including:
- a magnetic recording disk to record data;
- a head to read or write the data to or from the disk;
- and
- a shock sensor designed to sense a shock condition;
- and
- wherein the shock sensor senses the shock condition based on a shock value being over an adaptable threshold level set by a user, wherein the shock value is determined by combining values of a linear accelerometer and an angular speed sensor.
A system for reading or writing data comprising:
- a hard disk drive including:
- a magnetic recording disk to record data;
- a head to read or write the data to or from the disk;
- and
- a shock sensor designed to sense a shock condition;
- and
- wherein the system performs a diagnosis on the hard disk drive after sensing a shock condition.
Dependencies are inferred from the claim text.