Xen - Can't boot domU: could not read boot disk

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https://bbs.archlinux.org – I installed Xen and seem to have everything working. I set up an HVM domU with some physical disks and an arch iso and went through the install as normal. After installation, I removed the ISO from the config and launched it again, but it won't boot. The Xen bios gives this:Booting from hard disk... Boot from hard disk failed: could not read the boot diskI've tried several times to get this right, but it's always the same result. As with a normal arch installation:# grub-install --recheck /dev/sda # grub-mkconfig -o /boot/grub/grub.cfgBoth give the expected outcome and report no (HowTos)