Re-copying files after file list

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itefix
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Joined: 01.05.2008 - 21:33
Re-copying files after file list

Using cwrsync for a local file backup, I am seeing that each time it is run, it is copying some of the files that haven't changed, as well as new ones that have.
Is there any reason why it should re-copy those files?

itefix
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Last seen: 2 weeks 14 hours ago
Joined: 01.05.2008 - 21:33
Re: Re-copying files after file list

In the case you use FAT file-system on source and/or destination side, you may encounter re-copying due to reduced accuracy of timestamps. From rsync documentation:

--modify-window
When comparing two timestamps, rsync treats the timestamps as being equal if they differ by no more than the modify-window value. This is normally 0 (for an exact match), but you may find it useful to set this to a larger value in some situations. In particular, when transferring to or from an MS Windows FAT filesystem (which represents times with a 2-second resolution), --modify-window=1 is useful (allowing times to differ by up to 1 second).

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