Re: standard performance (write speed ??Mb/s) - new raid5 array

Why did you create partitions?  The whole point of zeroing the first 512
bytes was to *eliminate* all the partitions...

Follow the post of Erwan Leroux, he advise creare a new partition with non-fs  
data :-/

No, you did not.  It seems you merged bits and pieces from each array
creation method.  The array may still function properly.  I've never
tried what you've done here.  Maybe others have the correct answer.

I wish it's everything ok :-)

Pol