From owner-freebsd-fs@FreeBSD.ORG  Thu Feb 19 12:22:42 2015
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To: freebsd-fs@freebsd.org
Subject: Re: Creating zpool on NVMe Disks takes forever
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On 02/19/2015 12:56 PM, Steven Hartland wrote:
> Disable trim on init:
> sysctl vfs.zfs.vdev.trim_on_init=0
this fixed it, thx!

but why does it take >8h to trim 2x 400GB? Or is trimming handled 
differently on NVMe than on HDD/SSD?