Spinning disk test study in determining the optimum writers and shingled track pitch for shingled write recording

Hard Disk Drive (HDD) Industry is approaching the end of the conventional perpendicular magnetic recording (PMR) technology due to the limitations of the super paramagnetic effect. Shingled magnetic recording (SMR) is the current likely alternative to extend areal density beyond 1 Tb/ in². SMR is feasible and the HDD industry has delivered the drives to the market after extensive research around the globe. Earlier studies by many researchers thought wide writers would provide good writability and would no longer be an issue in SMR. However, in our study, we reveal that there exists an optimal write width for SMR for a given writer design. In this work, we aim to determine the optimal writer width and the shingling track pitch conditions.