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Track Path for a Rotary Head

IP.com Disclosure Number: IPCOM000049813D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Stemwedel, JK: AUTHOR

Abstract

The path of the track of a rotary head drive is offset from the edge of the tape one track further than the first byte of data of the next track. The average path of each track is at a small angle to the tape length such that, in a block of data, the end of the track is at the same distance from the edge of the tape as the start of the subsequent track. At least two transducers are provided in the rotary head offset but positioned the same distance from the edge of the rotor. The rotary head is transported laterally during reading and writing and follows a fixed parallel motion along the tape when not transferring data.

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Track Path for a Rotary Head

The path of the track of a rotary head drive is offset from the edge of the tape one track further than the first byte of data of the next track. The average path of each track is at a small angle to the tape length such that, in a block of data, the end of the track is at the same distance from the edge of the tape as the start of the subsequent track. At least two transducers are provided in the rotary head offset but positioned the same distance from the edge of the rotor. The rotary head is transported laterally during reading and writing and follows a fixed parallel motion along the tape when not transferring data.

In a rotating head drive, the tape magnetic medium is wrapped around e rotor and held stationary while the read/write heads are mounted on the rotor and pass under the medium at a constant linear velocity. Parallel tracks are accessed by moving the head laterally.

When all of the tracks have been accessed within the one block of data, the medium is physically moved so that the next block is in contact with the rotor and the heads are again positioned over the first byte on the first track. In order to achieve an increase in performance with multiple transducers in the rotary head, the path of the track is set such that the last data from one track is offset from the edge of the track the same distance as the first data of the subsequent track. The multiple transducers are offset but positioned the same distance from the edge of the rotor.

In the figure, a tape 1 is shown having a pluralit...