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[Xen-users] OpenSolaris 103 HVM no longer boots after upgrade from Xen 3.2 to Xen 3.4

I've performed an upgrade of our Xen machines from a 32 bit 3.2 hypervisor to a 64 bit 3.4 one. Pretty much all has gone well but we have a few Open Solaris HVM machines (we had to do HVM as PV domU was causing dom0 to randomly lock up hard).

Anyway, the problem I'm having is that I cannot succesfully boot these Solaris HVMs on the newer hypervisor. I get to grub and this boots the kernel, but it doesn't get much further than this before giving an error and trying to reboot.

I think the cause of this is because the disk subsystem is being exposed differently and my kernel is looking for it elsewhere as the boot archive was created under the 3.2 hypervisor, but I'm struggling to find any documentation to back this up.

My config file is:

 name = "solaris-dev"
 builder = "hvm"
 memory = "512"
 disk = [ 'phy:/dev/drbd29,hda,w' ]
 vif = [ 'type=ioemu,bridge=eth0,mac=00:16:3E:06:F3:65' ]
 kernel = "/usr/lib/xen/boot/hvmloader"
 serial = "pty"
 on_reboot = 'preserve'
 on_crash = 'preserve'

and if I boot this on my remaining 3.2 hypervisor it comes up fine.
The error message I get when booting under the 3.4 hypervisor is:

 WARNING: pv driver failed to connect: /xpvd/xdf@768
 Cannot mount root on /pci@0,0/pci-ide@1,1/ide@0/cmdk@0,0:a fstype ufs

 panic[cpu0]/thread=fffffffffbc2a120: vfs_mountroot: cannot mount root

If I don't have 'preserve' in my config then it just reboots.

If I boot into recovery mode then it just gives me a "No installed OS instances found" message when I would expect it to offer me the opportunity to mount the OS at /a.

Has anyone had any similar experience to this or could offer any advice?

Thanks in advance,


Adam Wilbraham - Systems Administrator
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