It's an on the fly sector mapper with colours to indicate the state of a sector
Red - bad header
Yellow - bad record
Cyan - unreliable
Green - in use
White - unused
Black - missing
[media]https://youtu.be/azv-60hyzI4[/media]
Not finished yet, still heaps more to do
Here's a special sector map for [mention]R-Tape[/mention]
Spoiler
[media]https://youtu.be/aITUgjY7IXA[/media]