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System and method for off-track write prevention and data recovery in multiple head optical tape drives

A technology of write prevention and drive, applied in the direction of systems, data recording, instruments, etc. characterized by the shape of the carrier

Active Publication Date: 2015-02-25
ORACLE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the performance limitations described above resulting from excessive external disturbances to the head or excessive momentary tape lateral movement can have a very adverse effect on the data capacity and transfer rate of such tape devices

Method used

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  • System and method for off-track write prevention and data recovery in multiple head optical tape drives
  • System and method for off-track write prevention and data recovery in multiple head optical tape drives
  • System and method for off-track write prevention and data recovery in multiple head optical tape drives

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Embodiment Construction

[0015] As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0016] refer to Figure 1a-4 , systems and methods for off-track write prevention and data recovery in an optical tape drive with multiple optical heads will be described. For ease of description and understanding, in the drawings, the same reference numerals are used herein to denote similar components and features.

[0017] As previously discussed, data storage tape devices with mul...

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Abstract

In an optical tape drive having optical heads for writing data in tracks on an optical tape, each track having an off-track threshold, a system and method are disclosed for off-track write prevention. The system includes multiple actuators, each actuator configured to control a position of an associated optical heads. The system also includes a controller configured to determine a position of each of the optical heads relative to an associated track on the optical tape and to prevent, in response to an event causing an optical heads to have a position outside the off-track threshold of the associated track, only that optical head from writing data to the optical tape and to buffer a stream of data for that optical head for later processing.

Description

technical field [0001] The following relates to systems and methods for off-track write prevention and data recovery in an optical tape drive having multiple optical read and / or write heads. Background technique [0002] Data storage tape devices with multiple heads typically use a method of preventing off-track (OT) writing of data to the media with a limited margin that relies on the layout of the data tracks on the media. Such a limited margin determines the OT threshold monitored by the servo subsystem of the tape device controlling the collective motion of the multiple heads. By using such a threshold, the servo subsystem prevents the device's read / write channels from writing data tracks too close to each other on the media. Writing data to the media begins, continues or resumes only if the servo subsystem is able to move the recording head within the allowed threshold. [0003] Current multiple head designs in these belt devices include a rigid body housing and actua...

Claims

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Application Information

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IPC IPC(8): G11B7/003G11B7/14
CPCG11B7/14G11B21/103G11B7/003
Inventor F·马纳德
Owner ORACLE INT CORP
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