Title:
ON-VEHICLE INFORMATION PROCESSOR, MAGNETIC DISK DEVICE AND METHOD FOR CONTROLLING THE ON-VEHICLE INFORMATION PROCESSOR
Document Type and Number:
Japanese Patent JP2004039061
Kind Code:
A
Abstract:
To prevent the loss of data when a magnetic disk device is mounted on an on-vehicle information processor under a high-temperature environment for a long time.
After the Lock position (engine stop) of the key switch 31 of a vehicle is detected, data files not updated for a fixed period in a magnetic disk device 300 incorporated in an on-vehicle information processor such as a car navigator 400 are recorded again after data are reproduced in the order of the oldness in the car navigator 400. Thus, the loss of data caused by thermal demagnetization or the like is prevented even when the magnetic disk device 300 is left for a long period of time in a vehicle which tends to become hot.
Inventors:
SATO NAOKI
YAMAGUCHI TAKASHI
SAITO ATSUSHI
NAKAMURA KOZO
TOKUYAMA MIKIO
NAKAMURA SHIGEO
KOHIDA HIROYUKI
MIYAZAWA HIROHISA
YAMAGUCHI TAKASHI
SAITO ATSUSHI
NAKAMURA KOZO
TOKUYAMA MIKIO
NAKAMURA SHIGEO
KOHIDA HIROYUKI
MIYAZAWA HIROHISA
Application Number:
JP2002192621A
Publication Date:
February 05, 2004
Filing Date:
July 01, 2002
Export Citation:
Assignee:
HITACHI LTD
ZANAVY INFORMATICS KK
ZANAVY INFORMATICS KK
International Classes:
G06F3/06; G01C21/32; G11B5/02; G11B5/09; G11B20/10; G11B20/18; G11B31/00; G11B33/14; H04N5/765; H04N5/781; (IPC1-7): G11B5/09; G06F3/06; G11B5/02; G11B20/10; G11B20/18; G11B31/00; G11B33/14; H04N5/765; H04N5/781
Attorney, Agent or Firm:
Yamato Tsutsui
Previous Patent: INFORMATION RECORDING MEDIUM, PROGRAM, AND INFORMATION RECORDING DEVICE
Next Patent: MAGNETIC TAPE
Next Patent: MAGNETIC TAPE