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From: Frank Solensky <frank@solensky.org>
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Subject: "Fatal Trap 19" on initial install
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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..