On Sun, Jan 06, 2013 at 02:27:31PM +0100, Jose Carlos Garcia Sogo wrote: > It wouldn't be bad having a way to do what you ask for. What would be the > overhead of computing a hash for a full large raw?
On my laptop, with an Intel Core 2 Duo CPU at 1.86 GHz, md5sum can do about 250 MB/s: (dd if=/dev/zero bs=1M count=1024 2> /dev/null) | pv | md5sum > /dev/null sha1sum is 189 MB/s (for curiosity, cat is 680 MB/s). That sounds like the checksum overhead would be insignificant compared to the speed from reading from CF, SD, or directly from camera. -- http://www.cafepress.com/trunktees -- geeky funny T-shirts http://gtdfh.branchable.com/ -- GTD for hackers
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