Interupt error.

[MaxAttack <maxmpd_(_at_)_zip_(_dot_)_com_(_dot_)_au>]

Ok if i leave my system ideling for some time i go back and i get a interupt(8)
error for hda
constantly going down my screen i cant write anything to openbsd ie
(ls, shutdown ) it just totally freezes
with that error poping up does this sound like a openbsd error or a
hardware error i wasnt quite sure where
to start to look . ?
Any help would be great.
Im running a old 486 with openbsd 2.5
Besides that everything seems ot be running fine.
 
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