In situ method and apparatus for detecting surface defects to id

Details In situ method and apparatus for detecting surface defects to id In situ method and apparatus for detecting surface defects to id

1998-04-17

2000-11-28

Butler, Dennis M.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 48, H05K 1000

Patent

active

061548588

ABSTRACT:
A method and apparatus are provided for detecting handling damage in a direct access storage device (DASD). The DASD has at least two magnetic disk surfaces provided by at least one disk mounted for rotation, and a corresponding transducer mounted for movement across each disk surfaces. A predefined test is performed to identify magnetic surface defects on each of the disk surfaces. The identified magnetic surface defects are utilized to identify cosited defects on at least two magnetic disk surfaces. Responsive to identifying a predefined number of cosited defects on at least two magnetic disk surfaces, handling damage is reported to the user. The method for detecting handling damage is performed responsive to a user request and following predetermined events during use of the direct access storage device.

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