hello.  Recently One of my FreeBSD-xen servers went down hard due to a 
power failure.
When it came back up, one of the domus' came up, but with no network interface. 
 Dmesg
messages show the following errors.  To fix the issue, I removed the 
/var/lib/xenstored/tdb
file and rebooted.  Before that, I couldn't get this domu to boot with a 
network interface.  My
question is, is it reasonable to take this action when such an error occurs 
and, further, might
it be better to remove that file before attempting to start xen on reboots, 
just in case
something didn't go down cleanly?
-thanks
-Brian

Jan 28 02:07:17 xen-lothlorien kernel: xnb(xnb_frontend_changed:1397): 
frontend_state=Initialised, xnb_state=InitWait
Jan 28 02:07:17 xen-lothlorien kernel: xnb1: Error 2 Unable to retrieve ring 
information from frontend /local/domain/7/device/vif/0.  Unable to connect.
Jan 28 02:07:17 xen-lothlorien kernel: xnb1: Fatal error. Transitioning to 
Closing State
Jan 28 02:07:17 xen-lothlorien kernel: xnb(xnb_frontend_changed:1397): 
frontend_state=Connected, xnb_state=Closing
Jan 28 02:07:17 xen-lothlorien kernel: xnb(xnb_connect_comms:793): rings 
connected!
Jan 28 02:07:17 xen-lothlorien kernel: xnb(xnb_frontend_changed:1397): 
frontend_state=Closed, xnb_state=Connected
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