Date: Tue, 20 May 2014 08:49:22 -0400 From: Michael Jung <mikej@mikej.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org, owner-freebsd-fs@freebsd.org Subject: Re: ZFS snapshot restore not quite working; missing =?UTF-8?Q?steps=3F?= Message-ID: <2dce8d576665e2f89fef4567e54589e4@mail.mikej.com> In-Reply-To: <C791C5E9A90A4D7BB68E39222DC5ABE7@multiplay.co.uk> References: <1129127016.20140517185154@supranet.net> <1198503903.20140518030907@supranet.net> <F8DBD16F6101498A98AA04D29C1FD596@multiplay.co.uk> <236659679.20140518035326@supranet.net> <3E3DCC6DED864A519B02A398B92D1994@multiplay.co.uk> <1879018434.20140519191844@supranet.net> <C791C5E9A90A4D7BB68E39222DC5ABE7@multiplay.co.uk>
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On , Steven Hartland wrote: > ----- Original Message ----- From: "Jeff Chan" <jeffc@supranet.net> > > >> Update: using the most current FreeBSD 9.0 - 9.2 ZFS instructions >> on the wiki page for the initial configuration caused the booting >> to ZFS to work: >> >> https://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/9.0-RELEASE >> >> including the GNOP trick, since these drives are "advanced format" and >> greater than 2TB size, and the -a 4k alignment to 4k sectors when >> creating the ZFS partitions. > > On later versions you can set vfs.zfs.min_auto_ashift=12 to achieve the > same thing as the GNOP trick, but thats only needed if your drive > doesn't > have a 4k quirk in our codebase. > > Regards > Steve > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" Steve, FreeBSD firewall 10.0-STABLE FreeBSD 10.0-STABLE #0 r266313: Sat May 17 11:52:18 EDT 2014 root@firewall:/usr/obj/usr/src/sys/VT amd64 Even though /boot/loader.conf contains vfs.zfs.min_auto_ashift=12 the value does not get set. [mikej@firewall ~]$ cat /boot/loader.conf zfs_load="YES" kern.maxswzone=16777216 vfs.zfs.min_auto_ashift=12 [mikej@firewall ~]$ [mikej@firewall ~]$ sysctl -a | grep ashift vfs.zfs.max_auto_ashift: 13 vfs.zfs.min_auto_ashift: 9 [mikej@firewall ~]$ Regards, --mikej
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