Rather than missing locked files, and also rsync being fairly resource  
intensive (and slow) this is how I am backing up Windows boxes now:

1. samba share on the linux BackupPC server
2. SyncBackSE on the Windows box does a "FastBackup" to the samba  
share on the BackupPC server
3. BackupPC server backs up the samba share directory

SyncBackSE can make use of Shadow Copy and can usually backup files  
that would be skipped by rsync, it is also very efficient, especially  
when using FastBackup mode.  BackupPC is still essential because it  
provides the "history" of the files in the samba share, so I have  
backups going back several months instead of just what was backed up  
last night by SyncBackSE.  It costs $30 per client, so it is not free  
like rsync, but I have less problems with it than I did with rsync.   
There is a free version of SyncBack, but it cannot use Shadow Copy nor  
FastBackup, so that isn't much better than just using rsync anyway.

Jonathan

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