[ILUG] How do I add a second disk to a xen vm?

[Stephen Burke]

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On Tue, 22 Apr 2008, Conor Wynne wrote:
> I need to add a second disk to a vm as i didn't make the original large
> enough for what I need.
> I have done the following so far:
> dd if=/dev/zero of=/var/xen_vms/newdisk.img bs=1M count=3000
>
> I then modified theconfig file as follws:
>
> name = "rh4_yum_server"
> uuid = "4a61b209-d111-1858-d7e6-948dc934e4af"
> maxmem = 400
> memory = 400
> vcpus = 1
> bootloader = "/usr/bin/pygrub"
> on_poweroff = "destroy"
> on_reboot = "restart"
> on_crash = "restart"
> vfb = [ "type=vnc,vncunused=1" ]
> disk = [ "tap:aio:/var/xen_images/rhel4_yum_server.img,xvda,w" ]
> disk = [ "tap:aio:/var/xen_images/yumsrvdisk2.img,xvdb,w" ]
> vif = [ "mac=00:16:3e:1e:7c:5a,bridge=xenbr0" ]
> No joy then. What am I doing wrong lads?

Humm....I use the following option for file based images in Xen:
disk = 
['file:/xens/vm/diskimage.img,sda1,w','file:/xens/vm/swapimage.img,sda2,w']

so you'd go:
disk = 
['file:/xens/vm/diskimage.img,sda1,w','file:/xens/vm/swapimage.img,sda2,w',file:/xens/vm/diskimage2.img,sda1,w']

I know thats a little different to what your xen config uses.

You could also resize your initial image that you created:
http://wiki.kartbuilding.net/index.php/Resize/Increase_the_Size_of_a_File_Based_DomU_Xen_Filesystem

Rgds,
Steve Burke
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