XCP storage driver domains
This page describes how to configure a storage driver domain on XCP 1.6. This is experimental software: please send feedback to xen-api@lists.xen.org.
Create a suitable VM
Install a VM in the usual way. A storage driver domain can be PV or HVM. A storage driver domain must have:
- the blkback kernel module
- the XCP block udev scripts (available in RPM)
- access to the storage medium (via the network or via a PCI passthrough device)
The blkback kernel module
Check you have the "xen-blkback" module (Linux) and "modprobe" it if its missing.
The XCP block udev scripts
These are needed to signal to the toolstack when a disk has been "attached".
PCI passthrough
Use "lspci" in dom0 to identify the storage controller you want to pass through. Take a note of the "BBBB:DD.F" identification string. Note that unless a multi-function device supports "Function Level Reset" on individual Functions you must pass all functions together as a group.
Use the "xe" CLI to associate this PCI device with your driver VM:
xe vm-param-set uuid=<VM uuid> other-config:pci=0/BBBB:DD.F,1/BBBB:DD.F
If you shutdown and then restart the VM (not reboot), you should see the device appear in the driver VM with "lspci" while in dom0 the device should be associated with "pciback".
