Seagate 1tb per disk technology marks another major milestone for the hard drive industry to make this happen seagate engineers had to pack 340000 hard drive tracks into the width of a single inch this means that when reading and writing data the readwrite head needs to accurately follow a track that is a mere 75 nano meters wide that39s about 500 times smaller than the period at the end of this sentence seagate acutrac technology helps enable this incredible feat reliably and accurately follo