Index: branches/fat32-0.9/src/fat32.c
===================================================================
--- branches/fat32-0.9/src/fat32.c	(revision 67)
+++ branches/fat32-0.9/src/fat32.c	(revision 68)
@@ -1277,4 +1277,10 @@
 f32Parms.fHighMem = TRUE;
 }
+
+ p = strstr( szArguments, "/calcfree");
+ if( !p )
+ p = strstr( szArguments, "-calcfree");
+ if( p )
+ f32Parms.fCalcFree = TRUE;
 
 #if 1
Index: branches/fat32-0.9/src/fat32def.h
===================================================================
--- branches/fat32-0.9/src/fat32def.h	(revision 67)
+++ branches/fat32-0.9/src/fat32def.h	(revision 68)
@@ -157,4 +157,5 @@
 USHORT fHighMem;
 USHORT fForceLoad;
+USHORT fCalcFree;
 } F32PARMS, *PF32PARMS;
 
Index: branches/fat32-0.9/src/ifsmount.c
===================================================================
--- branches/fat32-0.9/src/ifsmount.c	(revision 67)
+++ branches/fat32-0.9/src/ifsmount.c	(revision 68)
@@ -167,8 +167,9 @@
 pVolInfo->fDiskCleanOnMount = TRUE;
 
- if (!pVolInfo->hDupVBP /*&&
- (pVolInfo->pBootFSInfo->ulFreeClusters == 0xFFFFFFFF ||
- !pVolInfo->fDiskClean ||
- pVolInfo->BootSect.bpb.FSinfoSec == 0xFFFF)*/)
+ if (!pVolInfo->hDupVBP &&
+ (f32Parms.fCalcFree ||
+ pVolInfo->pBootFSInfo->ulFreeClusters == 0xFFFFFFFF ||
+ /*!pVolInfo->fDiskClean ||*/
+ pVolInfo->BootSect.bpb.FSinfoSec == 0xFFFF))
 GetFreeSpace(pVolInfo);
 
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