Shared Virtual Disk

Question

When creating a virtual shared disk oracle VM Manager -> Resources -> Shared Virtual Disks the only option you have are
Virtual Disk Name:
Virtual Disk Size:
Server Pool name:
Group Name:
Description:
My question is how do you know what this virtual disk is mapped to? i.e. SAN, NFS, LOCAL DISK?
Also how do you specific what disk to use ideally I would like the virtual disk to use a 150GB LUN from my SAN?

Answer 1

With the exception of multipath devices (and plain files obviously), there is no user interface for other kinds of devices for back end storage for DomUs, but Xen supports them. You have to edit the config yourself. They are in /OVS/running_pool/<name>/vm.cfg
Look for the disk = line and edit it to something like this:
disk = [
'phy:/dev/DomUDisk2/LVOracleApp,xvda,w',
In this case, I used a local LVM logical volume as back end storage (/dev/DumUDisk2) and I mapped it to the paravirtual device in the vm (xvda). You have to do something similar. I don't have a SAN/HBAs, but assuming your LUN shows up on Dom0 as /dev/sda, you might give a try to something like:
disk = ['file:/OVS/running_pool/myvm/System.img,hda,w', # or whater you want to do for the boot/root disk
*'phy:/dev/sda,xvda,w',* ]
Once this works, you might want to configure multipath if your hardware supports it.
Best of luck, keep us posted.