Newbie Coder wrote
I'm fascinated by your mention of this MS disc map - I'm going to see if
I can track it down later on. (I bet it'll be somewhere in the horrible
maze that is the MSDN download section.)
I use have used O&O Defrag 2000 Freeware Edition for some time, and it
shows a disc map where one can examine the contents of the cluster
groups :
http://www.majorgeeks.com/O&O_Defrag_2000_Freeware_Edition_d4545.html
Google turned up Auslogics disc defrag, also freeware, which I have only
tried once (my drives are reasonably well housekept so the try-out
didn't achieve much), but in addition to the disc map it produces a
defrag report :
http://www.auslogics.com/disk-defrag/index.php