Tape Head Null Shield for Concurrent Write Verify
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Solution Overview
Problem
Conventional tape heads require separate structures for writing and read-verifying data, leading to precise assembly challenges, susceptibility to mis-registration due to tape skew, and potential data loss from time delays between writing and reading.
Innovation Solution
A tape head with a same gap verify (SGV) module comprising write and read transducer pairs on a substrate, where a null shield is used to create a null region between the transducers, allowing concurrent writing and read verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate head structures are used for writing and read-verifying data, then read-verify function can be enabled, but assembly precision requirements increase and mis-registration susceptibility worsens
Solution Approach 1:
The patent combines the write transducer and read transducer into a single integrated head structure, eliminating the need for separate head structures. This merging approach maintains the read-verify function while reducing assembly precision requirements, as the transducers are manufactured as integrated components rather than assembled separately.
Solution Approach 2:
The head structure is designed to perform multiple functions - both writing data and reading/verifying data - within a single integrated unit. This multi-functionality eliminates the need for separate specialized structures, thereby reducing assembly complexity while maintaining reliable read-verify capability.
2Reliability
If separate head structures are used for writing and read-verifying data, then read-verify function can be enabled, but mis-registration due to tape skew increases
Solution Approach 1:
By merging the write and read transducers into a single head structure with fixed relative positioning, the invention eliminates the separation between writing and reading operations. This ensures that both functions occur at the same physical location on the tape, preventing mis-registration issues caused by tape skew that affect separate structures.
3Reliability
If separate head structures are used for writing and read-verifying data, then read-verify function can be enabled, but time delay between writing and reading increases
Solution Approach 1:
The integrated head structure allows the write and read transducers to operate simultaneously at the same location on the tape. This eliminates the time delay inherent in separate structures where data must be written, transported, and then read, enabling immediate verification and reducing data loss from re-writing.
4Productivity
If write and read transducers are positioned close together, then concurrent operation is enabled, but magnetic interference increases
Solution Approach 1:
The patent introduces a magnetic shield as an intermediary element positioned between the write and read transducers. This shield blocks magnetic flux from the write transducer from interfering with the read transducer, enabling close positioning for concurrent operation while eliminating magnetic interference through the shielding mechanism.
Solution Approach 2:
The magnetic shield creates a localized magnetic field distribution where the write transducer can operate at full strength without affecting the read transducer. By confining the magnetic flux paths through strategic positioning of the shield, the invention allows close spacing while maintaining operational independence of each transducer.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simultaneous data writing and verification, reducing mis-registration issues and data loss by allowing the write and read transducers to operate concurrently, improving data storage efficiency and reliability.
Implementation Method 1
a null shield disposed between the write transducer and the read transducer... create a null region
Implementation Method 2
The magnetic write transducer then generates a magnetic field, which encodes the data into the magnetic media
Implementation Method 3
Data is read from the media by similarly positioning the magnetic read transducer and then sensing the magnetic field of the magnetic media
Data Source
AI summary
The present disclosure generally relates to a tape drive including a tape head. The tape head comprises at least one same gap verify (SGV) module comprising a plurality of write transducer and read transducer pairs disposed on a substrate. Each pair comprises a null shield disposed between the write transducer and the read transducer. One or more of a position between the write transducer and the read transducer of each pair, a width, a height, a thickness, and a permeability of the null shield is adjusted to create a null region, and the read transducer is disposed in the null region. The SGV module is configured to write data to a tape using the write transducer of each pair and read verify the data written on the tape using the read transducer of each pair such that the write transducer and read transducer of each pair are concurrently operable.