1.) Successfully cloning an empty 126GB NTFS partition:

[DBG] Entering cleanup_cursor
[DBG] String length before first for loop:
4721
[DBG] String length before second for loop:
4721
[DBG] String value:
NTFS volume version: 3.1
Cluster size       : 4096 bytes
Current volume size: 135289401344 bytes (135290 MB)
Current device size: 135289405440 bytes (135290 MB)
Scanning volume ...
100.00 percent completed
Accounting clusters ...
Space in use       : 72 MB (0.1%)   
Cloning NTFS ...
100.00 percent completed
Syncing ...

[DBG] String value: Leaving cleanup_cursor


2.) Unsuccessfully cloning a full 195GB NTFS partition:

[DBG] Entering cleanup_cursor
[DBG] String length before first for loop:
12428851
[DBG] String length before second for loop:
12428851
[DBG] String value:
NTFS volume version: 3.1
Cluster size       : 4096 bytes
Current volume size: 209909141504 bytes (209910 MB)
Current device size: 209909145600 bytes (209910 MB)
Scanning volume ...
100.00 percent completed        <-- written to a log file that's a couple of lines going from 0 - 100%
Accounting clusters ...
Space in use       : 203595 MB (97.0%)   
Cloning NTFS ...
100.00 percent completed        <-- this one's around 400,000 lines going from 0 - 100%
Syncing ...

--> not leaving cleanup_cursor
