Hi! I am planning to make a raid 1 for my mother's mac pro 1,1. She has 2x4 tb disks I just bought and I was thinking of the easiest way for her (she is not a tech person) to have kind of a back up on 2 disks. I first thought of CCC but even if I make a script, I fear she will do something wrong ... Until now she used 2 disks copying manually to the both of them with some small differencies. But I would like to set up the raid 1 config now and would like to know this - How long does it take for a 4 TB disk to be rebuilt in the raid 1 if one is failing? I am asking this because I tested this config with 2x250 gb disks and it took like 40 min to rebuild 2 files (500 megs)!! So I am afraid that in case of failure this will take several days and this is not an option for me. And I read on some forums that it really takes a lot of time to rebuild which is not very logical because it should just copy/paste the files unless the raid 1 is something really special and does take more time because of its 'architecture'.... Thank you! ps. The disks are only data - no system on them.