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NTFS file count discrepancies 
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Joined: Sat Feb 15, 2014 00:45
Posts: 2
Post NTFS file count discrepancies
I have an NTFS hard drive originally used with a windows system in an external case via USB. The case failed and I am trying to recover the files for my brother. I have a G4 PPC tower running 10.4.11 and was able to mount the drive via firewire in a different external case.

I made a drag copy of the files which changed all of the folder dates to the current date. I then used an archiver utility to dupe the files to a .dmg and preserve these dates. I burned the drag-copy and the .dmg to DVDs, but none of the checksums I have been able to generate match.

I've scanned the NTFS drive and the copies I've made into a cataloging program for comparison's sake. The NTFS drive and the .dmg file each show 6,017 files. The drag copy shows 6,018 files. While I have already discounted the drag copy, I believe this hidden file accounts for the extra file: .DS_Store (which was probably generated during the drag copy in the first place). I also see a hidden file named ".Trashes" on the disk image that I don't see on the NTFS drive.

I used Disk Utility to burn the DVDs. Disk Utility identifies the file count at 6,565. This leads me to believe there are 548 files on the NTFS drive that I am unable to see on my Mac. So, I found NTFS-3G to see if the read-only NTFS driver was denying me access to a windows trash/recycle bin that might contain the unaccounted for files.

But I don't see anything different on the drive, other than now that I've cataloged it again, it also has a .DS_Store file and a .Trashes folder now.

So, I am trying to account for the missing 548 files. Could they be locked away in a hidden windows trash? If so, how can I access it on a mac?

Or, in that "a little knowledge is dangerous" mode, could the NTFS system files account for all of these files? I saw mention of a "metadata image" on the FAQ sticky for this board. Could such an image lead me to an answer? Any help in figuring this out would be greatly appreciated.

Best regards,

Mark Harrison


Sat Feb 15, 2014 01:36
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Joined: Sat Feb 15, 2014 00:45
Posts: 2
Post Re: NTFS file count discrepancies
Okay, so I generated the metadata image of my NTFS volume with the ntfsmetaclone tool, but I am unable to read the image on my mac. However, the log file generated by the tool suggests that there are 23 "records" in the metadata, looking like this:

Code:
Executing command: './AuthExec' '/bin/bash' '-c' '(./ntfs-3g.clone -mso - "/dev/disk5s1" | bzip2 > "/Users/markharrison/test3.img.bz2"; test "${PIPESTATUS[*]}" == "0 0" && (exit 0)) || (exit 1)'...
ntfs-3g.clone 2009.4.4
NTFS volume version: 3.1
Cluster size       : 4096 bytes
Current volume size: 500105216000 bytes (500106 MB)
Current device size: 500105217024 bytes (500106 MB)
Scanning volume ...
  0.00 percent completed
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 16 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 17 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 18 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 19 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 20 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 21 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 22 has no FILE magic (0x0)
ntfs_mst_post_read_fixup: magic: 0x00000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 23 has no FILE magic (0x0)
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ntfs_mst_post_read_fixup: magic: 0x03000000  size: 1024  usa_ofs: 0  usa_count: 65535: Invalid argument
Record 6655 has no FILE magic (0x3000000)
Saving NTFS to image ...
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Syncing ...             
Process returned normally.


Am I leaping to conclusions here?

I then hit on the idea of searching the catalog I made for folders and found 523 items. I also confirmed that a search for files reproduced the count of 6,017 items. 523 plus 23 accounts for nearly the 548 file count discrepancy I am trying to resolve.

I have since witnessed the file count reported by Disk Utility also shift by 2, between the native read-only driver and the NTFS-3G driver. I would like to conclude that I have accounted for the discrepancy. Could anyone confirm this for me?

Thanks again,

Mark Harrison


Mon Feb 17, 2014 04:34
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