Accurate disk info was reported when doing the same backup to a Windows 7 desktop.
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DAILY BACKUP TO WORKSTATION REPORT
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Backup of oreo.****.org started at Mon Jul 4 16:45:03 2011
Backup of mysql databases has been done
Mounting backup shared directory 192.168.0.50/users/admin/downloads/
Backup temp directory /mnt/smb/tmp_dir/oreo.***.org is mounted and is writable
Using set number 0 of 2
Attempt full backup
Backup directory oreo.****.org/set0 created
Backup base file name is full-201107041645
Making backup in temp directory
Using a backup session timeout of : 88500 seconds
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75705 inode(s) saved
with 0 hard link(s) recorded
0 inode(s) changed at the moment of the backup
0 inode(s) not saved (no inode/file change)
0 inode(s) failed to save (filesystem error)
244 inode(s) ignored (excluded by filters)
0 inode(s) recorded as deleted from reference backup
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Total number of inode considered: 75949
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Rotating backups in a new set /mnt/smb/oreo.****.org/set0.
Moving backup files to target directory /mnt/smb/oreo.****.org/set0
Disk usage 133G, 44% full, 172G available
Updating backup configuration data
Backup successfully terminated at : Mon Jul 4 19:36:43 2011