Boot Lockup on XenServer 5.5 (r203178)

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Hi,

I am having problems booting my 9 box at r203178 in Citrix XenServer 5.5.

The last time I updated this box was October 3rd.

The box now hangs at:

Trying to mount root from ufs:/dev/ad0s1a


I am unable to break to the debugger on this system right now.

Any tips would be useful.

Thanks

tj-tinderbox# uname -a
FreeBSD tj-tinderbox.XXXX 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Fri Oct  2
21:15:34 UTC 2009     tj_at_tj-tinderbox.XXXX:/usr/obj/usr/src/sys/GENERIC
 i386


tj-tinderbox# cd sys/i386/conf/
tj-tinderbox# svn diff
Index: GENERIC
===================================================================
- --- GENERIC	(revision 203178)
+++ GENERIC	(working copy)
_at__at_ -76,7 +76,12 _at__at_
 options 	INVARIANT_SUPPORT	# Extra sanity checks of internal
structures, required by INVARIANTS
 options 	WITNESS			# Enable checks to detect deadlocks and cycles
 options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed
+options     DEBUG_LOCKS
+options     DEBUG_VFS_LOCKS
+options     DIAGNOSTIC

+options BREAK_TO_DEBUGGER
+
 # To make an SMP kernel, the next two lines are needed
 options 	SMP			# Symmetric MultiProcessor Kernel
 device		apic			# I/O APIC
tj-tinderbox# cd /usr/src

tj-tinderbox# svn info
Path: .
URL: http://svn.freebsd.org/base/head
Repository Root: http://svn.freebsd.org/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 203178
Node Kind: directory
Schedule: normal
Last Changed Author: marcel
Last Changed Rev: 203177
Last Changed Date: 2010-01-29 20:37:12 +0000 (Fri, 29 Jan 2010)




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TJU13-ARIN
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