Method for screening tunnel valve tape heads for magnetic noise
AssigneeInternational Business Machines Corporation
InventorsRobert G. Biskeborn, W. Stanley Czarnecki, Venus Hipolito
Life of this patent
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Abstract
A computer-implemented method for screening a multichannel head, according to one embodiment, includes measuring a channel signal to noise ratio value for each read transducer over a plurality of sense currents, wherein each transducer is one of a plurality of transducers in a multichannel head. The measured channel signal to noise ratio values are compared to a specification of a pre-defined value. The multichannel head is dispositioned to enable the multichannel head to perform to the specification of the pre-defined value, if possible.
Claims20
A computer-implemented method for screening a multichannel head, the method comprising:
- measuring a channel signal to noise ratio value for each read transducer over a plurality of sense currents, wherein each transducer is one of a plurality of transducers in a multichannel head;
- comparing the measured channel signal to noise ratio values to a specification of a pre-defined value;
- and
- dispositioning the multichannel head to enable the multichannel head to perform to the specification of the pre-defined value.
A computer program product for screening a multichannel head, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable and/or executable by a processor to cause the processor to perform a method comprising:
- measuring, by the processor, a channel signal to noise ratio value for each read transducer over a plurality of sense currents, wherein each transducer is one of a plurality of transducers in a multichannel head;
- comparing, by the processor, the measured channel signal to noise ratio values to a specification of a pre-defined value;
- and
- dispositioning, by the processor, the multichannel head to enable the multichannel head to perform to the specification of the pre-defined value.
A system, comprising:
- a processor;
- and
- a controller and logic integrated with the processor and/or executable by the controller, the logic being configured to:
- measure a channel signal to noise ratio value for each read transducer over a plurality of sense currents, wherein each transducer is one of a plurality of transducers in a multichannel head;
- compare the measured channel signal to noise ratio values to a specification of a pre-defined value;
- and
- disposition the multichannel head to enable the multichannel head to perform to the specification of the pre-defined value.
Dependencies are inferred from the claim text.