Re: does chunksize matter in raid-1?

Jeff Breidenbach wrote:

Does chunk size matter *at all* for RAID-1?

mdadm --create /dev/md0 --level=1 --chunk=8 /dev/sdc1 /dev/sdd1   mdadm --create /dev/md0 --level=1 --chunk=128 /dev/sdc1 /dev/sdd1

In my mental model of how RAID works, it can't possibly matter
what my chunk size is whether I've got 1KB files or 1GB files because
no striped reading occurs.

Is my mental model wrong?

No, chunk size does not matter for raid1. In fact, some/most? kernels will print a message to that effect if you specify a chunk size for a raid1 array.

--
Paul