From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:34946)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kwolf@redhat.com>) id 1WQCU0-0008AU-K3
	for qemu-devel@nongnu.org; Wed, 19 Mar 2014 05:08:26 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <kwolf@redhat.com>) id 1WQCTt-0005aV-Ca
	for qemu-devel@nongnu.org; Wed, 19 Mar 2014 05:08:20 -0400
Received: from mx1.redhat.com ([209.132.183.28]:14112)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kwolf@redhat.com>) id 1WQCTt-0005aN-0M
	for qemu-devel@nongnu.org; Wed, 19 Mar 2014 05:08:13 -0400
Date: Wed, 19 Mar 2014 10:08:08 +0100
From: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20140319090808.GB3263@noname.str.redhat.com>
References: <CAN7x1o6LqB_MYM9Rez3t1QP1d88bkxMnHdArmCBnLOP5Da-=xw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
In-Reply-To: <CAN7x1o6LqB_MYM9Rez3t1QP1d88bkxMnHdArmCBnLOP5Da-=xw@mail.gmail.com>
Content-Transfer-Encoding: quoted-printable
Subject: Re: [Qemu-devel] Qcow file does not mount
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Atlas Khan <atlaskhan90@gmail.com>
Cc: qemu-devel <qemu-devel@nongnu.org>

Am 19.03.2014 um 07:06 hat Atlas Khan geschrieben:
> I am doing a task in which I have to enter some data which is in a dire=
ctory in
> qcow/qcow2 file. The thing I want to ask is that how can I do this if I=
 have
> boot looder or =A0guest system in a directory rather than in iso file. =
I try to
> make a qcow image and mount it on my file system.=A0
> Process for mounting which i m following is=A0
>=20
> $ modprobe nbd max_part=3D63
> $ qemu-nbd -c /dev/nbd0 image.img
> $ mount /dev/nbd0p1 /mnt/image
>=20
> I have a qcow file of malta mips. If run these commands on malta mips q=
cow
> file, It mount it. But if i try to mount a qcow file created by followi=
ng
> command
>=20
> qemu-img create -f qcow2 test.qcow2 10G
>=20
> it give following error
>=20
> mount: special device /dev/nbd0p1 does not exist
>=20
> can any one help me how can I write some data in qcow or mount my qcow =
file.

A new image is unpartitioned. You need to use something like fdisk on
/dev/nbd0 first in order to create the partitions. After that, you may
or may not need to restart qemu-nbd, not completely sure.

Kevin