If using entire drives for an mdadm RAID which will be the boot device as well, is it more correct / standard to:
1) Configure the RAID out of partitions that encompass the whole drive (like /dev/sda1 + /dev/sdb1) and then partition the resulting single md device into the various partitions.
2) Create all the partitions on each drive in their desired sizes and then create RAIDs of those (e.g. sda1 + sdb1, sda2 + sdb2, sda3 + sdb3, etc.)
I'm thinking the benefit to #1 would be ease of drive replacement, and also I was told that #1 allows mdadm to parallelize reads across the various member drives more effectively.
Is there some authoritative link which talks about one as being the preferred way to go?