Constant chaning ahc0: Tranceiver state changing

[Joe S. Joplin]

	I have  a 4.6 Server running SAMBA for a small office.  I recently added a second SCSI Hard drive to the ADAPTEC 29160 Controller Card.  Now after the machine has been in use for more than a few minutes.  The server start repeating the follow lines on the screen.  
	 
	   ahc0:  Transceiver State Has Changed to SE mode.
	   ahc0:  Transceiver State Has Changed to LVD mode.
	 
	At that time I can not logon or access the box in any way.  I have to power down the box to shut it down.  
	 
	Anyone have any ideas?
	 
	Thanks,
	 
	Joe