misc/165418: Problems mounting root filesystem from XENHVM

[Stefan Witzel]

>Number:         165418
>Category:       misc
>Synopsis:       Problems mounting root filesystem from XENHVM
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Feb 23 12:20:10 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Stefan Witzel
>Release:        FreeBSD 9.0 STABLE
>Organization:
Universitaet Goettingen
>Environment:
not available (see below)
>Description:
I installed FreeBSD 9.0 from the installation CD on a Xenserver 6.0. This virtual machine runs without any problems.

When I try to boot a XENHVM kernel built from the standard configuration file I get the messages

Trying to mount root from ufs:/dev/ada0o2 [rw] ...
mountroot: waiting for device /dev/ada0p2 ...
Mounting from ufs:/dev/ada0p2 failed with error 19.

The only managed disk device shown by the ? command of mount root is cd0.

I also tried to boot the XENHVM kernel after I replaced "ada0" by "ado" in /etc/fstab as suggested by Dave Scott (http://dave.recoil.org) but also in this case the root device could not be mounted.



>How-To-Repeat:
Boot XENHVM kernel
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: