Hi All
I am working on NAVSO P-5239 -36(RLL) algorithm for file erasing from disk, and read from somewhere that this algorithm provides the following steps:

1) all bytes of hard disk sectors are filles with ones (0x01)
2) hard disk sectors are consistently filled with values of 0x27FFFFFF type.
3) Secttors are filled with random symbol pattern ( not a pair of sectors should contain identical patterns).
4) writing patterns are verified.

Are these steps are used to erase a file?
if yes then I am not sure the role of RLL encoding in the algorthim.

please solve my problem.

Thanks