Unable to create ZVOL (error=6)

[Nikolay Denev]

Hi,

I have a cron to generate daily snapshots like this:

    0 0 * * * root /sbin/zfs snapshot -r zfs/bhyve_volumes@`/bin/date
+\%H:\%M:\%S_\%d-\%m-\%Y`

And I've noticed that I have the following errors in dmesg:

    ZFS WARNING: Unable to create ZVOL
zfs/bhyve_volumes/freebsd_amd64_10_stable at 00:00:00_05-10-2014
(error=6).

Snapshot looks ok, it's just that the ZVOL cdev is not created :

[12:11][ndenev at nas:~]%zfs get creation
zfs/bhyve_volumes/freebsd_amd64_10_stable at 00:00:00_05-10-2014

NAME
PROPERTY  VALUE                  SOURCE

zfs/bhyve_volumes/freebsd_amd64_10_stable at 00:00:00_05-10-2014
creation  Sun Oct  5  0:00 2014  -

Error 6 would be ENXIO.
I think this might be due to "volmode=dev" setting, as I've ruled out
name lenght, or invalid characters.



--Nikolay