I'm getting confused by this "Advanced Format" (4KB sectors) talk of bigger (2TB) drives - and I am wondering about how I would resolve this if I'm building a new software (mdadm) RAID-5 array.
The drives I'm gonna buy is the Western Digitial Caviar® Green 2TB, 64MB cache. And probably 4, or maybe 6, of these to make me a new RAID5 storage.
With my older setup, 6x500GB drives in RAID-5, I included the whole drives (/dev/sda, /dev/sdb ..) without any partition-table, and then made the ext4-fs on the whole raid /dev/md0 without any partition-table.
But with this "Advanced Format" thingie, I'm wondering if I have to make a GPT-partition-table on these 2TB-drives, with a 1024kb offset(?), include the partitions in a RAID-5 array, and then also make a GPT-partition-table before making the file system? Is this necessary to get good speed from the array? Or could I use the old way of doing it, without noticing any difference?
Also... Is there any parameters I should be aware of while making the RAID-5 by mdadm to get the best speed? (In regard to the 4GB sectors of the drives). And also, should I format this storage with any special parameters? I'm planning on building an EXT-4 filesystem.
Sorry for this confused post, but I'm pretty confused myself of what this "Advanced Format" is and how this would impact my planned RAID-setup.
EDIT: And also... Any advice on the RAID5 chunk size I should use?