Re: [Xen-users] xen 4.4 cannot attach disk at boot time( raw and vhd) for qemu-xen-traditional

["kevin.zhang@xxxxxxxxxxx" <kevin.zhang@xxxxxxxxxxx>]

Hi jacek burghardt,

     I'm sorry to bother you again.

     When I use xl to create a qemu-xen-traditional domU with tap2:vhd type disk, 

qemu-dm cannot attach vhd disk to domU and tap-ctl list is null.

     I really don't know what has been changed in xen 4.4 and where to report this problem.

Could you give me some guide? 

---

Best Regards

 

From: kevin.zhang@xxxxxxxxxxx

Date: 2014-07-21 14:05

To: jacek burghardt

CC: xen-users

Subject: Re: [Xen-users] xen 4.4 cannot attach disk at boot time( vhd) for qemu-xen-traditional

Hi jacek,

     

    Thank you for your reply.

    Actually, we are using tap2:vhd as driver since xen 4.0.

    When it came to xen 4.4+, however, there may be some changes in qemu-xen-traditional. Today, I confirmed that tap2:aio works well.But,

    I use disk=['tap2:vhd:/srv/local/2.vhd,xvda,rw'] in my config file, and after xl create, I look through the qemu-dm log file. It said:

qemu-dm-win08.log:

    Using xvda for guest's hda
    Strip off blktap sub-type prefix to /srv/local/2.vhd (drv 'vhd')
    qemu: type (image format) 'vhd' unknown for vbd '/local/domain/0/backend/qdisk/103/51712/type' or image '/srv/local/2.vhd'

   

   Is there any possibility that qemu-xen-traditional has changed ?

   My system has blktap module loaded:

        root@debian:~# lsmod|grep blk 

        xen_blkfront 17398 0 

        blktap 23920 0 

        xen_blkback 22112 0 

---

 

From: jacek burghardt

Date: 2014-07-21 12:35

To: kevin.zhang@xxxxxxxxxxx

CC: xen-users

Subject: Re: [Xen-users] xen 4.4 cannot attach disk at boot time(  vhd) for qemu-xen-traditional

Did you read this ?

http://wiki.xen.org/wiki/Blktap2

On Sun, Jul 20, 2014 at 7:56 PM, kevin.zhang@xxxxxxxxxxx <kevin.zhang@xxxxxxxxxxx> wrote:

Hi all,            Today  I am testing xen 4.5 unstable, and want to make some comparison between qemu-xen and qemu-xen-traditional.I firstly create hvm domU with qemu-xen and try to use the similar config file to boot with qemu-xen-traditional.  It's quite strange thatqemu-xen-traditional cannot attach disk image at boot time, including raw and vhd.      Does anyone have the same experience? Or is there any solution to fix it?      My config to boot hvm domU with qemu-xen-traditional is :name='centos'builder="hvm"memory=4096vcpus=4vif=['bridge=br0']disk=['tap2:vhd:/srv/local/2.vhd,xvda,rw','tap2:aio:/srv/local/CentOS-6.4-x86_64-LiveCD.iso,hdb,ro,cdrom']boot='c'device_model_version="qemu-xen-traditional"viridian=1vnc=1vnclisten="0.0.0.0"localtime=1usbdevice=["tablet"]

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