On Sun, May 26, 2019 at 2:27 AM Matthew Moore <matthew@moore.sydney> wrote: > > Hi all, > > I'm setting up a RAID6 array on 8 * 8TB drives, which are obviously > using 4k sectors. The high-level view is XFS-on-LUKS-on-mdraid6. Are these driver 4kB native or 512e? For 4kB native, you don't need to do anything. For 512e, just make sure NOT to create RAID on top of non-4kB-aligned partitions. Thanks, Song > > I've traditionally used partitions appropriately aligned to 4k sectors, > however my understanding is that modern utilities properly recognise and > align to the underlying disk structure. > > Can I simply create the array on top of the physical disks, do I need to > tell mdadm to offset/align, or do I need to continue to use partitions > on the physical disks to get the best performance from this setup? > > Many thanks in advance. >
