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Subject: Re: Unable to create ZVOL error since upgrading to 9.3-RELEASE
From: Paul Mather <freebsd-lists@gromit.dlib.vt.edu>
In-Reply-To: <72AA3F10-C5A2-45F6-BC4B-B214A16EEEB6@gromit.dlib.vt.edu>
Date: Mon, 4 Aug 2014 11:22:19 -0400
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On Jul 30, 2014, at 10:22 AM, Paul Mather =
<freebsd-lists@gromit.dlib.vt.edu> wrote:

> I have a nightly backup job that creates a snapshot of my ZFS pool,=20
> mounts the snapshot file sets appropriately under /backup, and then=20
> rsyncs that hierarchy to another system.  This worked fine under=20
> 9.2-RELEASE and before.
>=20
> Since upgrading to 9.3-RELEASE, I get the following error in the daily=20=

> security run output for that machine:
>=20
> =3D=3D=3D=3D=3D
> redmine kernel log messages:
> +++ /tmp/security.6itlEbCD	2014-07-30 03:01:10.401183488 -0400
> +ZFS WARNING: Unable to create ZVOL sys/SWAP/swap@backup (error=3D17).
> =3D=3D=3D=3D=3D
>=20
> I have swap on a ZFS ZVOL: sys/SWAP/swap.  I create the snapshot via=20=

> "zfs snapshot -r sys@backup" ("sys" is the name of my ZFS pool).
>=20
> Does anyone know why I should be getting this error now?  The same=20
> script running on the same machine gave no problems under 9.2-RELEASE. =
=20
> I started getting this message as soon as I upgraded to 9.3-RELEASE.
>=20
> Did some sysctl default change between 9.2-RELEASE and 9.3-RELEASE =
that=20
> changed the behaviour of ZVOLs and snapshots?
>=20
> The message isn't fatal, but it is annoying to have it appear every =
day=20
> in the security run output.
>=20
> Cheers,
>=20
> Paul.


I didn't get any responses to this, but, as a followup, I decided to=20
upgrade that system to 10.0-RELEASE-p7 and now the problem no longer=20
occurs.  So, I figure this must be something peculiar to 9.3-RELEASE.

Cheers,

Paul.