Title:
MAGNETIC DISC RECORDING/REPRODUCTION DEVICE AND METHOD FOR EVALUATING HEAT MITIGATION DEGRADATION IN MAGNETIC DISC RECORDING/REPRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/103736
Kind Code:
A1
Abstract:
There are provided a method for evaluating heat mitigation in magnetic recording and a method for judging the state of a magnetic recording/reproduction device satisfying a service life guarantee condition. The method for judging the state of the magnetic disc recording/reproduction device is a heat mitigation degradation evaluation method for a magnetic disc recording/reproduction device having a magnetic disc and head for performing write and read to/from the magnetic disc. A predetermined signal is written onto the magnetic disc and the written/recorded signal is repeatedly read out at a predetermined time interval for a predetermined period of time. Each time read-out is carried out, an error ratio is measured. Furthermore, a relationship of the logarithm of the time elapse and the measured error ratio is rectilinearly approximated so as to evaluate the error ratio of the magnetic disc recording/reproduction device at the moment when the predetermined period of time is exceeded.
Inventors:
NAKAO KAORI (JP)
Application Number:
PCT/JP2005/005760
Publication Date:
October 05, 2006
Filing Date:
March 28, 2005
Export Citation:
Assignee:
FUJITSU LTD (JP)
NAKAO KAORI (JP)
NAKAO KAORI (JP)
International Classes:
G11B5/00; G11B5/09; G11B20/18
Foreign References:
| JPH10255202A | 1998-09-25 | |||
| JPH103601A | 1998-01-06 | |||
| US6147488A | 2000-11-14 |
Attorney, Agent or Firm:
Hayashi, Tsunenori (Doi & Associates 3rd Floor, Toshou-Bldg.
No.3, 3-9-5, Shin-yokohama, Kohoku-k, Yokohama-shi Kanagawa, JP)
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