Re: [Xen-users] block-attach on dom0 missing

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Dec 18, 2009 at 12:50:24PM +0530, Tanuj Bansal wrote:
>    Yes, I know to use kpartx and it is easy but need to know this
>    also...please let me know...where is attached device
> 

I have never seen anyone doing this, so I don't know if it's supported.

-- Pasi

>    On Fri, Dec 18, 2009 at 12:47 PM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
> 
>      On Fri, Dec 18, 2009 at 12:33:37PM +0530, Tanuj Bansal wrote:
>      >    I have one domU using the disk file tanuj.dsk
>      >
>      >    [root@tanuj-xen-new virtual]# cat /etc/xen/tanuj
>      >    name = "tanuj"
>      >    uuid = "3d9ab75d-e08f-bac9-b56c-1cd6a43d1e35"
>      >    maxmem = 300
>      >    memory = 300
>      >    vcpus = 4
>      >    bootloader = "/usr/bin/pygrub"
>      >    on_poweroff = "destroy"
>      >    on_reboot = "restart"
>      >    on_crash = "restart"
>      >    vfb = [  ]
>      >    disk = [ "tap:aio:/virtual/tanuj.dsk,xvda,w",
>      "phy:/dev/sda11,xvdb,w" ]
>      >    vif = [ "mac=00:16:3e:32:e9:5f,bridge=xenbr0" ]
>      >    [root@tanuj-xen-new virtual]#
>      >
>      >    and this domU has disk /dev/xvda1 mounted at /boot
>      >
>      >    [root@tanuj ~]# df -h /boot
>      >    Filesystem            Size  Used Avail Use% Mounted on
>      >    /dev/xvda1             99M   13M   81M  14% /boot
>      >    [root@tanuj ~]#
>      >
>      >    now I am trying to attach that /dev/xvda1 on my dom0
>      >
>      >    #  xm block-attach 0 tanuj.dsk /dev/xvda1 w 0
>      >
>      >    Now I can see the attached device in xm list --long
>      >
> 
>      <snip>
>      >
>      >    But I am not able to locate that disk /dev/xvda1 on my dom0 and how
>      can i
>      >    mount it even if my domU is down
>      >
>      >    I know that the /dev/xvda1 data can be taken by using losetup and
>      kpartx
>      >    but need to know about this
>      >
> 
>      Why do you need this? just use kpartx (no need for losetup), it's much
>      easier and it works.
>      -- Pasi
> 
> References
> 
>    Visible links
>    1. mailto:pasik@xxxxxx

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