发明名称 |
Method and apparatus for determining the tribology for a head/disk interface |
摘要 |
A method and apparatus are provided for determining the tribology for a head/disk interface in a direct access storage device (DASD). A readback signal is obtained from a predetermined cylinder. The readback signal is sampled to provide a readback sampled sequence. The readback sampled sequence is summed to store a sum for each data sector of a plurality of data sectors in said predetermined cylinder. Predetermined discrete Fourier transform (DFT) magnitude components are calculated for the data sector sums. A harmonic ratio is calculated utilizing the calculated predetermined DFT magnitude components. The calculated harmonic ratio is compared with a predefined threshold value to identify the tribology for a head/disk interface.
|
申请公布号 |
US2002141090(A1) |
申请公布日期 |
2002.10.03 |
申请号 |
US20010772266 |
申请日期 |
2001.01.29 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION. |
发明人 |
OTTESEN HAL HJALMAR;SMITH GORDON JAMES |
分类号 |
G11B27/36;(IPC1-7):G11B27/36;G11B5/02;G11B5/596 |
主分类号 |
G11B27/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|