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need sd card backup on r-pi-3b


Trying to dd a copy of the micro-sd card the pi-3b is booting from, to 
another micro-sd card in a usb reader/writer, and winding up with 
nothing but an empty lost+found directory on it.

Obviously some sort of a syntax error, but it still takes the pi several 
hours to do it, with the traffic led on the reader/writer showing 
continuous activity.

Is there another way/util that actually works for making verbatim backups 
of these limited lifetime sd cards?


Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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