The -c option causes rsync to checksum EVERY file on both ends BEFORE rsync does anything else. It checksums files that are on only 1 end. It checksums files that are different sizes. It will not catch a hardware problem preventing rsync from writing a file correctly.
On 03/23/2017 03:12 PM, steven banville via rsync wrote:
>
> Hi
>
>
> I am using "rsync" to send files from a source machine to a remote
> machine as one typically does. I would like to clarify that the "-c"
> option will cause the checksum on the receiving end to be created by
> reading the already written file and NOT the data stream on the
> receiving end. This would help in catching disk I/O errors if the
> checksum is done on the file on disk.
>
> I understand if the size and (or date?) don't match, the checksum is not
> needed on the receiving end.
>
> I may be missing something but it wasn't entirely clear to me that the
> checksum is done based on the file on disk.
>
> Thanks,
> -Steve
>
>
>
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