[Bug 195855] New: freebsd-update damages file system after 10.0 -> 10.1 install

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195855

            Bug ID: 195855
           Summary: freebsd-update damages file system after 10.0 -> 10.1
                    install
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: i386
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: bfriedman at emax.ca

See:
http://lists.freebsd.org/pipermail/freebsd-questions/2014-December/262896.html

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
appreciated)

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)

dmesg output:
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
 
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x4400<CNXT-ID,xTPR>

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