Hi DES, unfortunately you need a quite bit more than this to work compatibly.
I've had a patch here that does just this for quite some time but there's been some discussion on how we want additional control over this so its not been commited. If others are interested I've attached this as it achieves what we needed here so may also be of use for others too. There's also a big discussion on illumos about this very subject ATM so I'm monitoring that too. Hopefully there will be a nice conclusion come from that how people want to proceed and we'll be able to get a change in that works for everyone. Regards Steve----- Original Message ----- From: "Dag-Erling Smørgrav" <d...@des.no>
To: <freebsd...@freebsd.org>; <freebsd-hackers@freebsd.org> Cc: <ivo...@freebsd.org> Sent: Wednesday, July 10, 2013 10:02 AM Subject: Make ZFS use the physical sector size when computing initial ashift The attached patch causes ZFS to base the minimum transfer size for a new vdev on the GEOM provider's stripesize (physical sector size) rather than sectorsize (logical sector size), provided that stripesize is a power of two larger than sectorsize and smaller than or equal to VDEV_PAD_SIZE. This should eliminate the need for ivoras@'s gnop trick when creating ZFS pools on Advanced Format drives. DES -- Dag-Erling Smørgrav - d...@des.no --------------------------------------------------------------------------------
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zzz-zfs-ashift-fix.patch
Description: Binary data
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