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Know a program that can differentiate two very large files fast?

Discussion in 'Windows OS and Software' started by NumLock, Aug 9, 2011.

NumLock Notebook Evangelist

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I'm copying some backup files of a database into an external hdd. Individual file sizes of these backups range from 300GB and a lot of them. Aside from looking at the file properties; is there a faster and more accurate way to determine if the files (the source and the destination) are identical?

notes:
- they are not text files; no need to compare text inside; just to tell the user if file a and copied file a in a different location are identical to each other.

Thanks in advance for any recommended software ^^

NumLock, Aug 9, 2011

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chimpanzee Notebook Virtuoso

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try md5sum though you should also trust the OS that when it returns ok, it means ok.

chimpanzee, Aug 9, 2011

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NumLock Notebook Evangelist

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the md5checker looks pretty neat and is portable. I hope it doesn't take a long time to get the md5 of a 300gb file.

thanks chimpanzee

NumLock, Aug 9, 2011

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fonduekid JSUTAONHTERBIRCKINTEHWLAL

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Try SyncBack - Lightweight, compares in detail, files in source and destination and tell' you the differences.

Cheers

fonduekid, Aug 9, 2011

#4