Magnetic disk device

  • Inventors: HATTORI SATORU
  • Assignees: Nec Corp
  • Publication Date: January 21, 1988
  • Publication Number: JP-S6314369-A

Abstract

PURPOSE: To attain efficient low power consumption for the operation of the titled device by using a power save signal from an electronic circuit section A to cut off a power supply for the electronic circuit of an electronic circuit section B not in use other than normal operation. CONSTITUTION: After a head disk assembly (HDA)60 reaches a steady-state rotation and several minutes elapse, an interface signal 101 informs to the electronic circuit section 40 capable of reading/writing from/to a host device 100. If no read/write request comes from the host device 100 continuously for a prescribed time after that, the electronic circuit section A41 sends a power save signal 42 to a power supply control circuit 30 in the magnetic disk device. The power control circuit 30 outputs a power OFF signal 31 so as to cut off only the power supply 10 for the electronic circuit while supplying a motor drive power supply 32, cuts a DC power output B11 being a power supply for driving an electronic circuit section B45, and the low power consumption operation is started. COPYRIGHT: (C)1988,JPO&Japio

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Cited By (9)

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    EP-1156485-A2November 21, 2001Fujitsu LimitedMethod and apparatus for controlling magnetic disk drive
    EP-1156485-A3November 28, 2001Fujitsu LimitedDispositif et procédé pour la commande d'une unité à disques magnétiques
    EP-1267331-A2December 18, 2002Fujitsu LimitedVorrichtung und Verfahren zur Steuerung einer magnetischen Platteneinheit
    EP-1267331-A3January 02, 2004Fujitsu LimitedVorrichtung und Verfahren zur Steuerung einer magnetischen Platteneinheit
    US-5691948-ANovember 25, 1997Fujitsu LimitedMemory apparatus
    US-5831782-ANovember 03, 1998Fujitsu LimitedMethod and apparatus for supplying optimal bias current to a magnetic head
    US-5956200-ASeptember 21, 1999Fujitsu LimitedMethod of and apparatus for controlling magnetic disc drive