Disk drive and disk medium

Disk drive and disk medium

  • CN 1,452,169 A
  • Filed: 02/27/2003
  • Published: 10/29/2003
  • Est. Priority Date: 04/18/2002
  • Status: Active Application
First Claim
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1. disc apparatus, in this disc apparatus, be divided into presumptive area to outer radius portion with a plurality of servo cylinder (20) that is formed centrally from the inner-diameter portion whose of at least one dish (10), and each presumptive area of dividing is provided with the different servo signal frequency respectively, servo signal pattern corresponding to the servo signal frequency that each described zone is provided with is formed in each described zone, and the servo signal frequency that storage in advance is provided with each described zoneWherein a plurality of described servo cylinders (20) are divided into described presumptive area, meanwhile, the servo signal frequency in each described zone is set, so that the recording density that is recorded in the servosignal on the described dish (10) can be set, thereby the demodulation characteristics of described servosignal is in the better scope.

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