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Manually Creating Xen Disk Block Devices in /dev
On newer distros normally udev will create these devices but in some cases it doesnt know how to. Our distros are deployed with the devices already created so that it's not a problem. If your building your own distro or managed to foobar you /dev directory you may need to create the xvda, xvdb, xvdc… devices. Below shows how to do this.
mknod /dev/xvda b 202 0 mknod /dev/xvdb b 202 16 mknod /dev/xvdc b 202 32 mknod /dev/xvdd b 202 48 mknod /dev/xvde b 202 64 mknod /dev/xvdf b 202 80 mknod /dev/xvdg b 202 96 mknod /dev/xvdh b 202 112