Editing Data remanence (section)

===Inaccessible media areas===

Storage media may have areas which become inaccessible by normal means. For example, [[Magnetic storage|magnetic disks]] may develop new [[bad sector]]s after data has been written, and tapes require inter-record gaps. Modern [[hard disk]]s often feature reallocation of marginal sectors or tracks, automated in a way that the [[operating system]] would not need to work with it. The problem is especially significant in [[Solid-state drive|solid-state drives]] (SSDs) that rely on relatively large relocated bad block tables. Attempts to counter data remanence by [[#Overwriting|overwriting]] may not be successful in such situations, as data remnants may persist in such nominally inaccessible areas.