BadClus info in a NTFS drive

[Patato12]

I'm using XPSP3 with a NTFS drive. Today i download the latest version (1.08.132) and defrag some files, because some new games installed recently. Then i check in the blank squares (cluster without files) and notice some strange thing: a NTFS system file called $BadClus:$Bad, used to mark bad cluster, as his name says.

I have a drive of 160 GB (or 149 GB in power of 2). 149,05 GB equals to 156.290.253 KB, very similar to the size informed in Defraggler with this file (156.288.320 KB), and, Windows Explorer tell me that this is the total size.

So, i think i have all the drive with Bad Clusters, i one word, losted.

 

But everything is ok, so, could be there a bug or this is normal?

 

I attach some image of the situation.

 

 

EDIT: I found some info in http://www.kessels.com/forum/index.php?act...age;topic=743.0 and http://www.djkaty.com/drupal/ntfsbadsectors

In my case, the $bitmap file is 4.77KB with a 512 bytes/sector so, that would be 9 or 10 clusters... well, that not much in a drive with 312.000.000 clusters...