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Date:      Thu, 1 Oct 2009 12:31:10 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Olivier Smedts <olivier@gid0.org>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: kern/139072: [zfs] zfs marked as production ready but it used a deprecated checksum algorithm
Message-ID:  <20091001103110.GB1595@garage.freebsd.pl>
In-Reply-To: <367b2c980910010221kd388f43q8243797b4eac9af7@mail.gmail.com>
References:  <200909230920.n8N9KIJ6005528@freefall.freebsd.org> <367b2c980910010221kd388f43q8243797b4eac9af7@mail.gmail.com>

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On Thu, Oct 01, 2009 at 11:21:03AM +0200, Olivier Smedts wrote:
> Hello,
>=20
> 2009/9/23  <pjd@freebsd.org>:
> > Synopsis: [zfs] zfs marked as production ready but it used a deprecated=
 checksum algorithm
> >
> > Responsible-Changed-From-To: freebsd-fs->pjd
> > Responsible-Changed-By: pjd
> > Responsible-Changed-When: =C5=9Bro 23 wrz 2009 09:19:57 UTC
> > Responsible-Changed-Why:
> > I'll take this one.
> >
> > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D139072
>=20
> Now that this PR is closed, is there something to change on *existing*
> zfs filesystems to make them use fletcher4 (for new data) when they
> have the default property "checksum=3Don" ? Is there something to do
> (other than dumping and restoring) to change checksums to fletcher4
> for existing data and metadata ?

You have to manually change checksum to fletcher4 for existing datasets,
I think and backup/restore your data.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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