The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2000
Filed:
Apr. 27, 1998
Matthew Peter Wojciechowski, Broomfield, CO (US);
Kurt William Pyatt, Longmont, CO (US);
Storage Technology Corporation, Louisville, CO (US);
Abstract
A characteristic of helical scan tracks is that a distortion that occurs in the written data tracks is not uniform over the entire length of the track. Therefore, segments of the helical scan track can be read even though the entirety of the helical scan track cannot be read in a single pass. Therefore, laterally moving the read heads a predetermined distance in a selected direction to access a section of the helical track can produce full amplitude read signals and thereby that section of helical scan track can be read. Once a section of the helical scan track is read, the read heads are moved another incremental distance to access a next section of the distorted helical scan track. Each section of the track is thereby read on a different helical scan as the read heads are incrementally repositioned on each scan. The read sections of the helical scan track are stored in the memory of the tape drive control unit and then used to reconstruct the entirety of the track. This enables the tape drive system to recover the entirety of the distorted helical scan track and data is not lost.