Re: dk for z/lvm volumes?

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

On Mon, 29 Jun 2020 at 16:31, Staffan Thomén <duck%shangtai.net@localhost> wrote:
>
> Michael van Elst wrote:
> > mlelstv%serpens.de@localhost (Michael van Elst) writes:
> >
> >> mlelstv%serpens.de@localhost (Michael van Elst) writes:
> >>> ci4ic4%gmail.com@localhost (Chavdar Ivanov) writes:
> >>>> # ccdconfig -c ccd0 0 /dev/zvol/dsk/pail/nbsd1
> >>>> ccdconfig: ioctl (CCDIOCSET): /dev/ccd0d: Inappropriate ioctl for device
> >
> >> That's a bug in the zfs driver.
> >
> > I've prepared a patch for -current that fixes this issue.
> >
> > http://ftp.netbsd.org/pub/NetBSD/misc/mlelstv/zvol.patch
> >
>
> I had occasion to try this patch (downloaded on June 19) on my Xen dom0 today,
> and things didn't go well;
>
> # ccdconfig -c ccd0 0 /dev/zvol/dsk/internal1/photos@backup

You are mapping a snapshot, it will be r/o.

You have to promote it first.

> ccdconfig: ioctl (CCDIOCSET): /dev/ccd0d: Read-only file system
>
> ...and a subsequent...
>
> # ccdconfig -g
>
> ...instantly rebooted the system (no crash dump). I wasn't monitoring the
> console so I don't know if any error was printed by the kernel. Nothing was
> recorded in syslog.
>
> This is NetBSD 9.0_STABLE from June 19 (built at the same time as the patched
> z, with xen 4.11 (4.11.3nb2)
>
> Staffan
>
>


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