Before revision: In this short note, a correction is made to the recently proposed solution  to a 1D biased diffusion model for linear DNA translocation and a new analysis will be given  ] ]  ]  ]  ] ]  .
After revision: In this short note, a correction is made to the recently proposed solution to a 1D biased diffusion model for linear DNA translocation and a new analysis will be given ] ] ] ] ] ] which we attribute to the entropic barrier effects; (II) at high voltages, the translocation velocity is a linear function of the applied electric field. In regime II, the apparent diffusion constant exhibits a quadratic dependence on applied electric field, suggesting a mechanism of Taylor dispersion effect likely due the electro-osmotic flow field in the nanopore channel. This analysis yields a dispersion-free diffusion constant value for the segment of DNA inside the nanopore which is in agreement with Stokes-Einstein theory quantitatively. The implication of Schrodinger's formula for DNA sequencing is discussed .