|Created date||Updated date||Affects version||Fix version|
|Drive Eraser - All versions||N/A|
Blancco Drive Eraser erased remapped sectors on a disk successfully, yet remapped sectors are shown on the erasure report and are seen when investigating the disk.
Modern drives have a lot of functions for self-testing, self-recovering and keeping track of their state. One of the possibilities is sector remapping. This allows the drives to detect and hide the sectors, which will either be or have become impossible to access. The drives have a so-called spare area intended precisely for this.
When a failed sector is detected, the drive controller assigns the address of the sector to a new one in the spare area. The address remains the same but the owner is changed. The remapped sector may contain some of the user's data.
Blancco Drive Eraser is able to successfully erase the data stored on the remapped sectors as long as the target drive supports the required erasure commands. Running successful erasure for the remapped sectors does not actually fix the bad/remapped sectors and such sectors will remain unusable in the future.