Disk memory device, disk memory device defect detecting method, and program recording medium
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorNoriaki Takaichi
Life of this patent
Estimating the term…
Abstract
A disk memory device according to the present invention measures a time for reading or writing a prescribed amount of data with an access time measurement part, compares access time data with a previously set limit time with an access time defect determining part, and, when the access time data exceeds the limit time, determines that a corresponding area on a disk memory (4) is defective, and enters the area into a defect list so that the corresponding area is not used. Thereby, when the disk memory device is used for recording/reproducing AV data, data access is performed within a prescribed time, so that videos are reproduced without interruption or data is recorded without lack of frame.
Claims9
A disk memory device comprising:
- an access time measurement part for measuring a time for reading or writing a prescribed amount of data;
- a limit time setting part for setting limit times for reading and writing the prescribed amount of data;
- an access time defect determining part for comparing the measured access time with the set limit time to determine a defect in an accessed area according to whether the access time is longer than the limit time or not;
- and
- a defect entry part for entering a position of an area which is determined as defective by the access time defect determining part, into a defect list, as a defective area position.
A disk memory device defect determining method comprising:
- measuring a time for reading or writing a prescribed amount of data;
- previously setting limit times for reading and writing the prescribed amount of data;
- and
- comparing the measured access time with the set limit time to determine a defect in an accessed area according to whether the access time is longer than the limit time or not.
A program recording medium in which a program for making a computer execute a defect determining process of a disk memory device is recorded, wherein
- the program comprises:
- measuring a time for reading or writing a prescribed amount of data;
- previously setting limit times for reading and writing the prescribed amount of data;
- and
- comparing the measured access time with the set limit time to determine a defect in an accessed area according to whether the access time is longer than the limit time or not.
A disk memory device comprising:
- an access time measurement part for measuring a time for reading or writing a prescribed amount of data;
- an access time data storage part for storing the measured access time;
- a reference time data storage part for storing data of an access time which is measured for the whole access area at manufacture of the disk memory device, as reference time data;
- and
- a defect determining part for comparing the access time data with the reference time data to determine a defect of the disk memory device.
A disk memory device defect determining method comprising:
- measuring a time for reading or writing a prescribed amount of data and storing the measured access time as access time data;
- storing data of an access time which is measured for the whole access area at manufacture of a disk memory device, as reference time data;
- and
- comparing the stored access time data with the stored reference time data to determine a defect of the disk memory device.
A program recording medium in which a program for making a computer execute a defect determining process of a disk memory device is recorded, wherein
- the program comprises:
- measuring a time for reading or writing a prescribed amount of data and storing the measured access time as access time data;
- storing data of an access time which is measured for the whole access area at manufacture of the disk memory device, as reference time data;
- and
- comparing the stored access time data with the stored reference time data to determine a defect of the disk memory device.
A disk memory device comprising:
- an access time measurement part for measuring a time for reading or writing a prescribed amount of data;
- an access time data storage part for storing the measured access time;
- a reference time data storage part for storing data of an access time which is measured for the whole access area at manufacture of the disk memory device, as reference time data;
- a defect determining part for comparing the access time data with the reference time data to determine a defect of the disk memory device;
- and
- a defect notification part for notifying a host device for controlling the disk memory device or a display part for displaying data, of the defect of the disk memory device when it is judged that the disk memory device is defective from the result of the determination by the defect determining part.
A disk memory device defect determining method comprising:
- measuring a time for reading or writing a prescribed amount of data and storing the measured access time as access time data;
- storing data of an access time which is measured for the whole access area at manufacture of a disk memory device, as reference time data;
- comparing the stored access time data with the stored reference time data to determine a defect of the disk memory device;
- and
- notifying a host device for controlling the disk memory device or a display part for displaying data, of the defect of the disk memory device when it is determined that the disk memory device is defective in the defect determination.
A program recording medium in which a program for making a computer execute a defect determining process of a disk memory device is recorded, wherein
- the program comprises:
- measuring a time for reading or writing a prescribed amount of data and storing the measured access time as access time data;
- storing data of an access time which is measured for the whole access area at manufacture of the disk memory device, as reference time data;
- comparing the stored access time data with the stored reference time data to determine a defect of the disk memory device;
- and
- notifying a host device for controlling the disk memory device or a display part for displaying data, of the defect of the disk memory device when it is determined that the disk memory device is defective in the defect determination.
Dependencies are inferred from the claim text.