Hi,
I´d love to know if this had been working propperly to you.
I just made 3 partitions per disk, and made 3 RAIDs 0 out of them.
Can you please let me know if you had any problems with this? I´ve also read that if you wanted to have a raid on mypassport pro you, then you couldn´t have any partitions. But disk utility allows you to make them. So not sure if it´s safe.
Thanks in advance