To encrypt or not to encrypt


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So, I recently picked up a few 10TB drives, so I'm expanding my array quite significantly for the first time in a while.

 

This seems like a good time to begin adding encrypted drives to my array, if I decide to do such a thing. I'd love to hear feedback from people who have used it. Are there any got'chas? Is there any reason not to do this?

 

I'm not sure exactly what I'll use as a key - whether it's a file on my local network, or just a passphrase (can this be changed after the fact without having to wipe drives? - but I'd like to hear some general opinions really. Does it present any problems for accessing a single drive physically connected to a Windows machine, for example? Is there a performance penalty? Should this be done to cache pool as well? Any other pain points that people didn't expect?

 

Thanks in advance!

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