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I have n disk clones that need to be checked against the source. I am looking for an efficient way to do this. Already tried md5sum and sha256sum but these take several minutes on a multi-gig drive and wont produce the intended result with drives of slightly differing sizes.

background info:

  • I am building an SD cloning tool.

Any thoughts?

user3738926
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    You might try to use a lower bit version of SHA. Otherwise, you really can't get around the time it takes to hash. – Kyte Jun 18 '14 at 14:07

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