> On Oct 6, 2015, at 11:06 AM, Eric van Gyzen <eric at vangyzen.net> wrote: > > Try this: > > sysctl vfs.zfs.vdev.trim_on_init=0 > zpool create tank mirror nvd[01] > That worked. So my guess is the controller/FreeBSD is timing out while zpool asks the drive to TRIM all 1.6TB?