Seanさんに >>89 をやった旨、メールしました。

Sean-san,

Today, tiger503 encountered suspicious system hangup again, and it is
already APC remote rebooted by the inside person of maido3.com.
So, the problem is still not solved.

And after that, I added an entry in /boot/loader.conf entry as seen
below:

# XXX
hw.physmem=3753062400

This limits the memory usage until 3.5G in FreeBSD. I heard that some
kind of motherboards should reserve for 32bit PCI DMA area.
Of couse, this is temporary fix and I am not sure that whether this
fix is effective or not.

>>91-92
自動で上がるようにしておかないと、私がいない時とか忙しい時に
リモートリブートがかかった場合に、どきどき。