🚀 go-pugleaf

I'm having an intermittant problem that is literally driving me nuts because
I can't track it down.  Can anyone help?

Configuration: IBM OS/2 1.2 SE, November 1990 update.
	       80386 20 MHz.  Micronics I-386CACHE motherboard.
	       Chicony CH-101 I/O adapter 
	       105 MB IDE Conner hard drive.
	       Phoenix 1.10 10A BIOS
	       Microsoft InPort Bus Mouse
	       Orchid Prodesigner+ Video board

The problem is this.  Occasionally, when copying files from my
5.25" 1.2MB B: drive to my 3.5" 1.44MB A: drive in the middle of the
copy, the system crashes with the message: 

	"Drive a:  Cannot find sector requested."

From that point on, drive a: is effectively unusable until I reboot
the system.  It continually crashes with this message whenever a:
is accessed in any way.

The initial crash does not happen everytime I copy from b: to a:.
It seems to be more likely to happen when copying large files, but it
does happen with small ones on occasion.

If I don't turn off the computer to reboot (either Ctrl+Alt+Del or RESET),
then the POST finds

	"invalid configuration data in CMOS"

and requests SETUP be run.  Unfortunately, I never see just what is
has been clobbered because SETUP automatically reconfigures properly.

Obviously, something is clobbering something somewhere.  Is it possible
that the system could be overflowing a copy buffer into the area
where configuration data is kept?  If so, then why don't I ever see
this problem with copies to/from my hard disk?

Could it be a timing problem or an interrupt conflict of some sort?

The machine manufacturer is unable to duplicate the problem on their
test machines.