Servo pattern of a tape storage medium
First Claim
1. A tape storage medium, comprising at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information which servo band (SB) comprises a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other,wherein each servo track (STx) of the set contains a servo pattern with a pseudo noise sequence (PN_x) of symbols,wherein the pseudo noise sequences (PN_x) of servo patterns of adjacent servo tracks (STx) are different from each other, andwherein the set of servo tracks (STx) contains at least three servo tracks (STx) with different pseudo noise sequences (PN_x).
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Accused Products
Abstract
A tape storage medium comprises at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information. The servo band (SB) comprises a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other. Each servo track (STx) of the set contains a servo pattern with a pseudo noise sequence (PN_x) of symbols, wherein the pseudo noise sequences (PN_x) of servo patterns of adjacent servo tracks (STx) are different from each other. The set of servo tracks (STx) contains at least three servo tracks (STx) with different pseudo noise sequences (PN_x).
29 Citations
14 Claims
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1. A tape storage medium, comprising at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information which servo band (SB) comprises a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other,
wherein each servo track (STx) of the set contains a servo pattern with a pseudo noise sequence (PN_x) of symbols, wherein the pseudo noise sequences (PN_x) of servo patterns of adjacent servo tracks (STx) are different from each other, and wherein the set of servo tracks (STx) contains at least three servo tracks (STx) with different pseudo noise sequences (PN_x).
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10. A method for operating a tape drive for reading and/or writing data for and/or to a tape storage medium (TP), the TP comprising at least one servo band (SB) along a longitudinal extension (x) for supporting to determine positional information, which SB comprises a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium and arranged next to each other, said method comprising:
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reading a servo band (SB) by a servo reader (SR), wherein each servo track (STx) of the set contains a servo pattern with a pseudo noise sequence (PN_x) of symbols, wherein the pseudo noise sequences (PN_x) of servo patterns of adjacent servo tracks (STx) are different from each other, and wherein the set of servo tracks (STx) includes at least three servo tracks (STx) with different pseudo noise sequences (PN_x), determining a lateral position value of a tape head (TH) containing the servo reader (SR) relative to the tape storage medium (TP) from a readback signal of the servo reader (SR), the determining the lateral position value including identifying one or more pseudo noise sequences (PN_x) in the readback signal of the servo reader (SR); and adjusting a lateral position of the tape head (TH) dependent on the lateral position value. - View Dependent Claims (11, 12, 13)
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14. A computer program product comprising a non-transitory computer readable medium having computer readable program code embodied therewith, the computer readable program code comprising computer readable program code configured to perform a method for operating a tape drive for reading and/or writing data for and/or to a tape storage medium (TP), the TP comprising at least one servo band (SB) along a longitudinal extension (x) for supporting to determine positional information, which SB comprises a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium and arranged next to each other, said method comprising:
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reading a servo band (SB) by a servo reader (SR), wherein each servo track (STx) of the set contains a servo pattern with a pseudo noise sequence (PN_x) of symbols, wherein the pseudo noise sequences (PN_x) of servo patterns of adjacent servo tracks (STx) are different from each other, and wherein the set of servo tracks (STx) includes at least three servo tracks (STx) with different pseudo noise sequences (PN_x), determining a lateral position value of a tape head (TH) containing the servo reader (SR) relative to the tape storage medium (TP) from a readback signal of the servo reader (SR), the determining the lateral position value including identifying one or more pseudo noise sequences (PN_x) in the readback signal of the servo reader (SR); and adjusting a lateral position of the tape head (TH) dependent on the lateral position value.
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Specification
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- Resources
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Current AssigneeInternational Business Machines Corporation
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Original AssigneeInternational Business Machines Corporation
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InventorsCherubini, Giovanni, Engelen, Johan B. C., Furrer, Simeon, Jelitto, Jens, Lantz, Mark A.
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Primary Examiner(s)HUBER, PAUL W
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Application NumberUS14/278,849Time in Patent Office383 DaysField of SearchNoneUS Class Current1/1CPC Class CodesG11B 20/1201 on tapesG11B 2220/90 Tape-like record carriersG11B 5/00817 on longitudinal tracks only...G11B 5/584 for track following on tapes
