[Xen-bugs] [Bug 514] New: /dev/vg/lv is already mounted in a guest domain

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=514

           Summary: /dev/vg/lv is already mounted in a guest domain
           Product: Xen
           Version: 3.0-testing
          Platform: x86
        OS/Version: Linux-2.6
            Status: NEW
          Severity: blocker
          Priority: P5
         Component: Tools
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: matta@xxxxxxxxxxxx


The issue: When starting a VM you receive: /etc/xen/scripts/block: 
> Device /dev/vg/lv is mounted in a guest domain, and so cannot be mounted
> now.
> 
> The info: Look in /var/log/xen-hotplug.log.  You will see lines such as:
> 
> xenstore-read: couldn't read path /local/domain/107/vm
> 
> The resolution: xenstore-rm backend/vbd/107

Attached is xen-bugtool info from a host it just happened on:

#xm li dinooz
xm li dinooz                            97       64     1 --p---     0.0

# vmctl start dinooz
Starting dinooz ..
Error: Domain 'dinooz' not found when running 'xm list'
Error: Device 2049 (vbd) could not be connected.
Device /dev/data/dinooz-root is mounted in a guest domain,
and so cannot be mounted now.
# tail -1 /var/log/xen-hotplug.log
xenstore-read: couldn't read path /local/domain/36/vm
#vmctl start dinooz
Starting dinooz ..
dinooz started.

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