Off-Track Error Probability Due to Adjacent Track Squeeze in Shingled Writing

Statistical investigations into off-track errors for shingled and conventional writing were carried out to reveal error behavior at high track densities. The residual data width in shingled writing tended to be wider than that in conventional writing for the same average track pitch. A comparison of the distributions of the calculated residual data width revealed that for conventional writing erroneous tracks were generated when the track was squeezed by both neighboring tracks, i.e., double squeezing. Shingled writing has an advantage in that this double squeezing does not occur and therefore a higher track density can be achieved.