I'm trying to create two 4 GB and one 8 GB file using dd (or cat which
produces the same result) under NetBSD 1.3.2.  The machine has 80 MB of
RAM, 16 MB of which has been configured as buffer cache.  There are six
SCSI disks with an Adaptec UW controller.

The system panics after writing about 3.8 to 4.2 GB of data.  The panics
look like this:

vm_fault(0xf09ee200, 0, 3, 0) -> 1
fatal page fault in supervisor mode
trap type 6 code 2 eip f0139e4e cs 8 eflags 10246 cr2 8 cpl c000c840
panic: trap
syncing disks... 13 13 6 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 giving up

or this:

vm_fault(0xf098a100, 0, 3, 0) -> 1
fatal page fault in supervisor mode
trap type 6 code 2 eip f0139e4e cs 8 eflags 10246 cr2 8 cpl c000c840
panic: trap
syncing disks... 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 giving up

I'm compiling a 1.3.3 kernel now to see if that fixes the problem, but
I doubt it.

I guess 1.4 fixes this (thanks to the new VM system), but it may also
introduce new problems like this, so I don't want to install 1.4ALPHA
on this production system yet.

Any hints?  I should really get this system back up, but every time I
write those files it crashes..  (I'm trying to put one file per disk,
I'm not using ccd on these disks, just plain FFS.)

As always, thanks a bunch..

  -jm