How are you measuring KBs on a 100's GB HDD?
There may be other HDD activity occurring.
Assuming a 250 GB HDD, 500kb = 0.00005%; insignificant amount of space.
How are you measuring KBs on a 100's GB HDD?free space on disk goes from 97860kB -> 97220kB (500 kB was somehow lost)!
Directory of R:\
04/08/2011 19:23 PM <DIR> TEMP
04/08/2011 15:57 PM 134,217,728 test
2 File(s) 134,247,936 bytes
1 Dir(s) 347,791,360 bytes free
Compressing files in r:\
test 134217728 : 8388608 = 16.0 to 1 [OK]
Directory of R:\
04/08/2011 19:23 PM <DIR> TEMP
04/08/2011 15:57 PM 134,217,728 test
2 File(s) 134,247,936 bytes
1 Dir(s) 347,136,000 bytes free
Volume in drive R has no label.
Volume Serial Number is 168E-17A9
Directory of R:\
04/08/2011 15:57 PM 134,217,728 test
1 File(s) 134,217,728 bytes
Total Files Listed:
1 File(s) 134,217,728 bytes
0 Dir(s) 370,806,784 bytes free
Compressing files in r:\
test 134217728 : 8388608 = 16.0 to 1 [OK]
1 files within 1 directories were compressed.
134,217,728 total bytes of data are stored in 8,388,608 bytes.
The compression ratio is 16.0 to 1.
Volume in drive R has no label.
Volume Serial Number is 168E-17A9
Directory of R:\
04/08/2011 15:57 PM 134,217,728 test
1 File(s) 134,217,728 bytes
Total Files Listed:
1 File(s) 134,217,728 bytes
0 Dir(s) 370,151,424 bytes free
D:\>dir /a
Volume in drive D has no label.
Volume Serial Number is 470F-C032
Directory of D:\
03/24/2011 20:42 PM <DIR> $RECYCLE.BIN
04/08/2011 15:55 PM <DIR> KMS
03/29/2011 23:07 PM <DIR> share
04/08/2011 15:41 PM <DIR> System Volume Information
04/08/2011 15:57 PM 134,217,728 test
1 File(s) 134,217,728 bytes
4 Dir(s) 13,340,741,632 bytes free
D:\>compact test /c
Compressing files in D:\
test 134217728 : 8388608 = 16.0 to 1 [OK]
1 files within 1 directories were compressed.
134,217,728 total bytes of data are stored in 8,388,608 bytes.
The compression ratio is 16.0 to 1.
D:\>dir /a
Volume in drive D has no label.
Volume Serial Number is 470F-C032
Directory of D:\
03/24/2011 20:42 PM <DIR> $RECYCLE.BIN
04/08/2011 15:55 PM <DIR> KMS
03/29/2011 23:07 PM <DIR> share
04/08/2011 15:41 PM <DIR> System Volume Information
04/08/2011 15:57 PM 134,217,728 test
1 File(s) 134,217,728 bytes
4 Dir(s) 13,340,082,176 bytes free
R:\>chkdsk /F /X
The type of the file system is NTFS.
Cannot lock current drive.
Volume dismounted. All opened handles to this volume are now invalid.
CHKDSK is verifying files (stage 1 of 3)...
256 file records processed.
File verification completed.
23 large file records processed.
0 bad file records processed.
0 EA records processed.
0 reparse records processed.
CHKDSK is verifying indexes (stage 2 of 3)...
274 index entries processed.
Index verification completed.
0 unindexed files scanned.
0 unindexed files recovered.
CHKDSK is verifying security descriptors (stage 3 of 3)...
256 file SDs/SIDs processed.
Security descriptor verification completed.
9 data files processed.
Windows has checked the file system and found no problems.
524287 KB total disk space.
29760 KB in 6 files.
72 KB in 11 indexes.
0 KB in bad sectors.
5359 KB in use by the system.
4672 KB occupied by the log file.
489096 KB available on disk.
4096 bytes in each allocation unit.
131071 total allocation units on disk.
122274 allocation units available on disk.
Volume in drive R has no label.
Volume Serial Number is 168E-17A9
Directory of R:\
04/08/2011 15:57 PM 134,217,728 test
1 File(s) 134,217,728 bytes
Total Files Listed:
1 File(s) 134,217,728 bytes
0 Dir(s) 496,640,000 bytes free
2. Can I format a RAMDisk drive?
Yes. RAMDisk drives can be formatted using Windows Disk Management