System failed to boot after install phase.
File system on amrd0 was changed from GPT to MBR and was not recognized as valid.
Worked around by manually commenting out entry in fstab.
Have not attempted to recover the bad file system (help on this would be
Logs of the update are available.
gpart show -lp
=> 63 1171783617 amrd0 MBR (559G)
63 1171783617 - free - (559G)
=> 34 286515133 amrd1 GPT (137G)
34 128 amrd1p1 (null) (64K)
162 276823936 amrd1p2 (null) (132G)
276824098 8388608 amrd1p3 (null) (4.0G)
285212706 1302461 - free - (636M)
amr0: delete logical drives supported by controller
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 572160MB (1171783680 sectors) RAID 5 (optimal)
amrd1: <LSILogic MegaRAID logical drive> on amr0
amrd1: 139900MB (286515200 sectors) RAID 1 (optimal)
CPU: Intel(R) Xeon(TM) CPU 2.80GHz (2791.05-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf29 Family = 0xf Model = 0x2 Stepping = 9