#48 dcheck reports logical sectors "in allocation map but not in file structure"

[Tormod Volden]

Building NitrOS-9 with latest repo toolshed and checking disk images with dcheck, there are some warnings on some disk images about logical sectors "in allocation map but not in file structure". Is this normal and the dcheck messages should be suppressed or better explained, or is something wrong?

os9 dcheck 3rdparty/packages/sierra/blackcauldron/BlackCauldron_dw.dsk 
Volume - 'The Black Cauldron' in file: 3rdparty/packages/sierra/blackcauldron/BlackCauldron_dw.dsk
$FFFE bytes in allocation map
1 sector per cluster
$07FFEC total sectors on media
Sector $000101 is start of root directory file descriptor
Building secondary allocation map...
Comparing primary and secondary allocation maps...
Logical sector 612 ($000264) of cluster 612 ($000264) in allocation map but not in file structure
Logical sector 613 ($000265) of cluster 613 ($000265) in allocation map but not in file structure
Logical sector 614 ($000266) of cluster 614 ($000266) in allocation map but not in file structure
Logical sector 615 ($000267) of cluster 615 ($000267) in allocation map but not in file structure
Logical sector 616 ($000268) of cluster 616 ($000268) in allocation map but not in file structure
Logical sector 617 ($000269) of cluster 617 ($000269) in allocation map but not in file structure
Logical sector 618 ($00026A) of cluster 618 ($00026A) in allocation map but not in file structure
Logical sector 619 ($00026B) of cluster 619 ($00026B) in allocation map but not in file structure
Logical sector 620 ($00026C) of cluster 620 ($00026C) in allocation map but not in file structure
Logical sector 621 ($00026D) of cluster 621 ($00026D) in allocation map but not in file structure
Logical sector 622 ($00026E) of cluster 622 ($00026E) in allocation map but not in file structure
Logical sector 623 ($00026F) of cluster 623 ($00026F) in allocation map but not in file structure
Logical sector 624 ($000270) of cluster 624 ($000270) in allocation map but not in file structure
Logical sector 625 ($000271) of cluster 625 ($000271) in allocation map but not in file structure
Logical sector 626 ($000272) of cluster 626 ($000272) in allocation map but not in file structure
Logical sector 627 ($000273) of cluster 627 ($000273) in allocation map but not in file structure
Logical sector 628 ($000274) of cluster 628 ($000274) in allocation map but not in file structure
Logical sector 629 ($000275) of cluster 629 ($000275) in allocation map but not in file structure

0 previously allocated cluster found
0 clusters in file structure but not in allocation map
18 clusters in allocation map but not in file structure
0 bad file decriptor sector

'The Black Cauldron' file structure is intact
2 directories

[tim lindner]

It is the DOS command boot track (34). We could change dcheck to recognize this and instead print a message like: "Found boot program allocated on track 34."