They just use a new technology to save the data using least bit of control data, while being as safe! Now they have taken advantage of this to come out of disks of the same capacity, while reducing the density of the plates! If they had kept the same density, we would indeed 7-11% extra space!
That's why I think it is misleading to the buyer lambda, the disk is 1.5TB or 2TB point, whether 2-3-4 trays that use a particular density for their data, it is not my main question!
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