Egregoros

Looks like #bhyve backed with sparse zvols presents virtual NVME disks with 512b sectors, but ahci and vtbd with 16K sectors. Huh.

Same underlying storage, why change the sector size? #freebsd

@mwl for me, on 15.0-R, both nvme and virtio present 512-byte sectors to the VM by default. (i haven't tested ahci.)

i usually change that to 4k anyway, but i'm not sure if that makes any real-world performance difference. i'm using regular (zfs) files though, not zvols, i wonder if that makes a difference.

@feld @mwl @lw Can you put the problem description into numbers?