Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2006-01-10
2006-01-10
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S075000, C360S097020
Reexamination Certificate
active
06985317
ABSTRACT:
The present invention provides a method, apparatus and program product for testing the reliability of a disk drive. The head-to-disk clearance of a disk drive is measured at different slider airbearing conditions. The change in head-to-disk clearance between the slider airbearing conditions is calculated. If the calculated head-to-disk clearance change between airbearing conditions for each of the heads in the disk drive exceeds a predetermined threshold, the disk drive is verified as having passed the reliability test. Differences in slider airbearing conditions are generated by varying pressures and/or temperatures under which the drive is operated.
REFERENCES:
patent: 6097559 (2000-08-01), Ottesen et al.
patent: 6411458 (2002-06-01), Billings et al.
patent: 6587301 (2003-07-01), Smith
patent: 6700726 (2004-03-01), Gillis et al.
McConnell William Harlow
Smith, legal representative Molly
Figueroa Natalia
Gold Darren
Hitachi Global Storage Technologies - Netherlands B.V.
Hudspeth David
Millett Douglas R.
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