Method and device for verifying a servo pattern in tape media
AssigneeOracle International Corporation
InventorSteven Gregory Trabert
Life of this patent
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Abstract
A system and method for verifying a servo pattern in tape media include a tape drive unit which moves the tape media lengthwise across a read head. The tape drive unit is adapted to use a tape comprising at least one servo band, each servo band including at least one servo pattern. The tape drive unit scans the read head across the servo band in a widthwise direction relative to the tape media. The system and method also include an electronic control unit that is adapted to verify the servo pattern.
Claims18
A method for verifying a servo pattern in tape media, the method comprising:
- moving the tape media across a read head in a direction parallel to a length of the tape media, the tape media comprising at least one servo band, each of the at least one servo band comprising a servo pattern;
- scanning the read head across the entire servo band in a direction parallel to a width of the tape media and reading the at least one servo pattern;
- and
- verifying the at least one servo pattern by demodulating the at least one servo pattern and calculating at least one of a mean moving range of peak amplitudes of a plurality of peak amplitudes of the at least one demodulated servo pattern and a standard deviation of a plurality of peak amplitudes of the at least one demodulated servo pattern.
A system for verifying a servo pattern on tape media, the system comprising:
- a tape drive unit adapted to move the tape media in a direction parallel to a length of the tape media, the tape media comprising at least one servo band, each of the at least one servo band comprising a servo pattern;
- a read head adapted to scan from edge to edge across a width of the servo band in a direction parallel to a width of the tape media;
- and
- an electronic control unit adapted to verify the at least one servo pattern based on signal parameters as the read head scans across the width of the servo band.
A method for verifying a servo pattern, the method comprising:
- positioning a read head to read a servo pattern, the servo pattern being written on a servo band contained in a tape;
- moving the tape across the read head;
- scanning the read head back and forth across an entire width of the servo band in a direction orthogonal to the direction of motion of the tape;
- reading and demodulating the servo pattern;
- generating a statistical analysis based on the demodulated servo pattern as a function of cross-band position;
- and
- verifying the servo pattern based on the statistical analysis.
Dependencies are inferred from the claim text.