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I'm trying to install Gentoo into a Xen HVM guest. Everything went fine with the install up to the point where you do the grub-install. Apparently, grub does not know about block devices labeled "xvd" (see https://bugs.gentoo.org/show_bug.cgi?id=424343). The initial error was:

 livecd# grub-install /dev/xvda /dev/xvda does not have any corresponding BIOS drive

After patching the /sbin/grub-install to see xvd devices and modifying /boot/grub/device.map to be:

 (hd0) /dev/xvda

I now get the following error:

 livecd# grub-install /dev/xvda df: Warning: cannot read table of mounted file systems: No such file or directory Could not find device for /boot: Not found or not a block device

The livecd sees the disks fine, and fdisk -l shows all my partitions:

 Disk /dev/xvda: 48.3 GB Device Start End System /dev/xvda1 2048 206847 Linux /dev/xvda2 206848 4302847 Linux swap / Solaris /dev/xvda3 43002848 94371739 Linux

Has anyone got Gentoo working on a Xen DomU? Any advice on getting past this would be appreciated. It appears only grub has an issue at this point.

Edit: Adding in /proc/mounts

 livecd ~ # cat /proc/mounts rootfs / rootfs rw 0 0 proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0 sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0 udev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=46256,mode=755 0 0 devpts /dev/pts devpts rw,relatime,gid=5,mode=620 0 0 tmpfs / tmpfs rw,relatime 0 0 /dev/sr0 /mnt/cdrom iso9660 ro,relatime 0 0 /dev/loop0 /mnt/livecd squashfs ro,relatime 0 0 xenfs /proc/xen xenfs rw,nosuid,nodev,noexec,relatime 0 0 rc-svcdir /mnt/livecd/lib64/rc/init.d tmpfs rw,nosuid,nodev,noexec,relatime,size=1024k,mode=755 0 0 fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0 shm /dev/shm tmpfs rw,nosuid,nodev,noexec,relatime 0 0 tmpfs /mnt/livecd/lib64/firmware tmpfs rw,relatime 0 0 tmpfs /mnt/livecd/usr/portage tmpfs rw,relatime 0 0 usbfs /proc/bus/usb usbfs rw,nosuid,noexec,relatime 0 0 /dev/xvda3 /mnt/gentoo ext3 rw,relatime,errors=continue,barrier=1,data=writeback 0 0 /dev/xvda1 /mnt/gentoo/boot ext3 rw,relatime,errors=continue,barrier=1,data=writeback 0 0 proc /mnt/gentoo/proc proc rw,relatime 0 0 udev /mnt/gentoo/dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=46256,mode=755 0 0 devpts /mnt/gentoo/dev/pts devpts rw,relatime,gid=5,mode=620 0 0 shm /mnt/gentoo/dev/shm tmpfs rw,nosuid,nodev,noexec,relatime 0 0

Output of ls /dev/da

 /dev/dac960_gam /dev/revalidate /dev/xvda /dev/xvda1 /dev/xvda2 /dev/xvda3
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  • Can you paste the output of ls /dev/*da*. Commented Jul 13, 2012 at 3:56
  • /dev/da output added Commented Jul 13, 2012 at 15:21
  • Please post your current DomU definition content. Commented Jul 15, 2012 at 21:27

1 Answer 1

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grub-install really only needs to know what device to install onto and since your livecd is not using a Xen kernel it won't have xvd devices. You can verify this by looking at /proc/mounts:

> cat /proc/mounts

So assuming /dev/sda is the device you need to install grub onto, all you really need to do to install grub in the livecd environment is:

> grub-install --no-floppy /dev/sda

You'll still need to make your grub.conf and fstab files with the correct xvd devices though.

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    /dev/sda is not available (and does not show up in /proc/mounts). What is available is /dev/xvda1 and /dev/xvda3 along with xenfs Commented Jul 12, 2012 at 17:07
  • @JohnP so change your definition file for the DomU on the Dom0 and replace xvda with hda. Commented Jul 15, 2012 at 21:27

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