ZFS native block size changed in recent netbsd-9?

[David Brownlee <abs%absd.org@localhost>]

Has the native disk block size reported via sata devices changed
recently in netbsd-9?

ZFS was set up on two netbsd-9 servers a while back. They have been
tracking the netbsd-9 branch and recently started to report a block
size mismatch. zdb shows all pools on both systems have  "ashift: 9".
Both systems have disks on standard onboard SATA controllers.

A third server was set up substantially more recently, and it does not
show the issue - it has two disks on onboard SATA with "ashift: 12",
and a six disk raidz2 on an mpii (devices show up as sdX rather than
wdX)

Puzzled

David

.....

Sample from "problem" output below.

status: One or more devices are configured to use a non-native block size.
        Expect reduced performance.
action: Replace affected devices with devices that support the
        configured block size, or migrate data to a properly configured
        pool.

        NAME        STATE     READ WRITE CKSUM
        onyx1       ONLINE       0     0     0
          wd2       ONLINE       0     0     0  block size: 512B
configured, 4096B native
          wd3       ONLINE       0     0     0  block size: 512B
configured, 4096B native