----- Original Message -----
From: "Patrick Dung" <
patrick_dkt@yahoo.com.hk>
Sent: Friday, October 25, 2013 4:53 PM
Subject: Re: [ADMIN] ZFS-FreeBSD + postgresql performance
>> I would also recommend to use 4K sector size using
>
> gnop and zpool export/import.
This will have no effect, the ashift for a pool is set at creation.
Regards
Steve
---------------------
To be specific, I think the steps should be gnop create, create zfs pool, export zfs, remove gnop and reimport zfs.
This link have the deatils and steps:
The link is:
http://ivoras.sharanet.org/blog/tree/2011-01-01.freebsd-on-4k-sector-drives.html