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        - Sun Proprietary/Confidential: Internal Use Only -
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                        FIELD INFORMATION NOTICE
                  (For Authorized Distribution by SunService)

FIN #: I0345-2

Create Date: Jan/26/98

Keywords: 

Ultra 2 Model 1300 UPA Bus Terminator Module recommended on uni-processor models.

Product Category: System

Product Affected: 

Ultra 2 Model 1300
	Ultra Enterprise 2 Model 1300
        X1192A Ultra 2 300Mhz CPU Module
        UG-M1XXX-M1300	Upgrade, Ultra 2 300Mhz CPU Module

Parts Affected: 

501-3132-12 or lower   Ultra 2 Motherboard Assembly 
	501-4196-XX            Ultra 2 300Mhz CPU Module

References: 

ECO# WO_11226
	
PROBLEM DESCRIPTION:

Engineering has released a UPA bus terminator module for Ultra 2 model
1300 single processor configured systems.  This terminator minimizes
UPA bus signal distortion on Ultra 2 Model 1300 motherboards, P/N
501-3132-12 or lower. An unterminated UPA bus may exhibit noise
problems in very high intensity UPA bus activity applications.

Issue Description: 

Engineering has released a UPA bus terminator module for Ultra 2 model
1300 single processor configured systems.  This terminator minimizes
UPA bus signal distortion on Ultra 2 Model 1300 motherboards, P/N
501-3132-12 or lower. An unterminated UPA bus may exhibit noise
problems in very high intensity UPA bus activity applications. Symptoms
may include CPU ECache data parity errors, ECC errors, async data
errors or hangs. Option X1192A is NOT structured with this terminator
and problems may occur in single CPU Ultra 2 Model 1300 system if the
terminator is NOT installed. The intention for Option X1192A is for
adding a second CPU to an existing system, NOT for CPU upgrades in uni-
processor systems.

Subsequently customers who order the Option X1192A as opposed to the
Upgrade kit UG-M1XXX-M1300, and exhibit the UPA bus signal distortion
symptoms, contact SunService logistics and request the UPA bus
terminator module, Thus SunSerice Logistics is experiencing a heavy
demand for UPA bus terminators.

Corrective Action: 

Information only, no action required. UPA bus terminator modules (PN
501-4843-01) are being shipped with Ultra 2 300Mhz CPU upgrades.
Customers seeking to obtain a Terminator module due to an incorrect
X-Option order, should contact their Sales Representative to obtain
one, and NOT request a Terminator module through SunService Logistics
channels.

Comments: 

This FIN is being released as information only and as such does not
require any activity on the part of any SunService departments or field
functions.


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