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Date: Sat, 22 Mar 2008 19:08:22 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Frank Solensky <frank@solensky.org>
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Cc: freebsd-questions@freebsd.org
Subject: Re: "Fatal Trap 19" on initial install
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Frank Solensky wrote:
> I'm attempting to add FreeBSD 7.0 onto a free disk partition on my Sony
> Vaio (VGN-FZ340E; Intel Core 2 Duo processor; 3 GB memory) and am
> running into a "Fatal Trap 19" while running the installation disks.
> Here's the last screenful of messages:
> 
>   NMI ISA b0, EISA FF
>   RAM parity error, likely hardware failure
> 
>   fatal trap 19: non-maskable interrupt trap while in kernel mode
>   instruction pointer     = 0xNMI ISA b0, EISA ff
>   RAM parity error, likely hardware failure
> 
>   fatal trap 19: non-maskable interrupt trap while in kernel mode
>   instruction pointer     = 0x8:0xFFFFFFFF802da7cf
>   stack pointer           = 0x10:0xFFFFFFFF80a738f0
>   frame pointer           = 0x10:0
>   code segment            = base 0x0, limit 0xfffff, type 0x1b
>                           = DPL 0, pres 1, def32 0, gran 1
>   processor eflags        = interrupt enabled, IOPL = 0
>   current process         = 0 (swapper)
>   trap number             = 19
>   panic: non-maskable interrupt trap
>   cpuid = 0
>   uptime = 1s
> 
> The above is from the attempt with 7.0 amd64; I've been stopped with
> similar errors on disks with 7.0 amd64 bootonly, 7.0 i386, 6.3 amd64 and
> 6.1 amd64.  I believe the "RAM parity error" is a red herring: I haven't
> had any problems running Linux or Vista on this machine and running
> Memtest86+ overnight didn't turn up any problems.
> 
> http://updraft3.jp.freebsd.org/cgi/query-pr.cgi?pr=i386/107564 appears
> to be similar but unresolved.
> 
> Trying with ACPI disabled stops at:
>   md0: Preloaded image </boot/mfsroot> 4194304 bytes at 0xFFFFFFFF80bc6c08
>   Trying to mount root from ufs:/dev/md0
> 
> Any suggestions?  Thanks in advance..

The other OSes may be recovering (with performance penalty) from your 
RAM errors due to additional code not present in FreeBSD.  In my 
experience this error is not a red herring, it indicates a real problem 
with your memory.

Kris