Ok, so I have three 4TB drives with no data. Two 4TB with data and four 2TB drives with data. If I understand what you are saying, whether I start with one parity drive or two parity drives it makes no difference. Adding all the data drives first, then adding the parity drives last would be fastest method for creating my array and migrating my data? Even though I will be preclearing my drives before they are added to the array, should a drive fail after it gets added to the array there is still a small chance of loosing all my data on the drives that are already in the array? (with no parity drive) Or just the data from the failed drive?
Does my method for migrating my data sound correct? (see previous post)
Thanks!