_ DEC-O-LOG for KN15-AA

_ DOL, KN15-AA-O002, Interaction between TURBOchannel DMA reads and I/O writes

OCT 93 - PROBLEM: The problem manifests itself as 
an interaction between TURBOchannel DMA reads 
and conflicted I/O writes, and results in the possibility 
of a system hanging forever.  The system will require a 
hard reset to clear this system hang.  All this is invis
ible to the software, since conflicts on the TURBO
channel are purely a hardware feature.
This revised FCO supersedes KN15-AA-O002, dated 
01-Jun-1993.

FIELD EFFECTIVITY:  This is an as needed FCO 
and should only be used on DEC 3000 AXP Model 
500/500S systems that meet ALL the following crite
ria: 
1. The system is exhibiting the symptoms described      
     below.
2. The system module (54-21149-01) is below revision   
    level J05 for D etch modules or J06 for F etch mod    
     ules.
3. Any options that utilize the TURBOchannel DMA     
    reads feature, such as:
     TNVRAM    JV2    PMAG-D    PMAGB-EA
     DEFTA    KZTSA-AA    PMAGB-DA    PMAGB-FA
NOTE:  This option list is not all inclusive.  Some 3rd 
party TURBOchannel options may also contribute to 
this problem

SOLUTION: The solution for this problem is to re
place the system module (54-21149-01) with a new sys
tem module - Rev. J05 D etch, or Rev. J06 F etch.

QUICK CHECK:   The system module (54-21149-01) 
is at minimum revision level J05 for D etch or J06 for 
F etch modules, and the system complies with the 
three criteria listed above.

FCO KIT ORDERING
EQ-01676-01	54-21149-01 System Module   
		and FA Document
FA-05012-01	Field Application Document 	
		(FA Document)


_ DOL, KN15-AA-O003, Emanation of smoke with H7883-AA & H7883-YA power supplies

JUN 93 - PROBLEM: Under certain failure modes 
there are indications for a potential of emanation of 
smoke accompanied by soot with the H7883-AA and 
H7883-YA power supplies.

FIELD EFFECTIVITY:  This is a "O" coded FCO and 
should be used on all DEC3000 AXP Model 500/500S 
systems with a H7883-AA below revision J01, and all 
DEC3000 AXP Model 500X systems with a H7883-YA 
power supply below revision C01.

SOLUTION:  The solution for this problem is to re
place the power supply harness (Part Number 70-
30004-01 Rev A01) with a new harness (Part Number 
70-30004-01 Rev B01).

QUICK CHECK:  For a H7883-AA power supply the 
minimum revision is J01, and for a H7883-YA power 
supply the minimum revision is C01.

FCO KIT ORDERING
EQ-01677-01	70-30004-01 Fused Cable, FA 
		Document, Revision Level 	
		Labels
FA-05013-01	Field Application Document 	
		(FA Document)


_ DOL, KN15-AA-F004, SCSI Controller transaction error

KN15-AA-F004     
JUN 94

APPLICABILITY: 
This FCO is customer installable and it should be
installed by Customer Services ONLY when demanded 
by the customer. This FCO is  for all  DEC3000/*  Alpha  
AXP Workstations shipped beginning December 1992 
until November 1, 1993, plus all DEC 3000 Model 600 
and 600S systems shipped before February 16, 1994. 

PROBLEM & SYMPTOM :
There is an EXTREMELY REMOTE possibility that  in a  
below  normal  temperature environment, a SCSI 
controller transaction error could occur. Through  
extensive testing  below  normal  operating temperatures, 
all observed occurrences of this condition have resulted 
in a detected  illegal command. Because this condition in 
THEORY could cause data corruption we have supplied 
a MUP  which  will  fix  this condition.     

SOLUTION: 
Installation of this MUP will provide enhanced parity  
protection on  SCSI controller transactions by 
programming parity pass through instead of parity 
generation in the SCSI controller chip(s).                        
                                                                              
QUICK CHECK: 
None                                                          

FCO KIT ORDERING:
 EQ-01699-01 
   DEC3000 OVMS AXP MUP 01 CD-ROM                        
       (AG-Q4B6A-BE)
   DEC3000 OSF/1 AXP MUP 01 CD-ROM                        
       (AG-Q42EA-BE)
   DEC3000 AXP MUP 01 Firmware Release Notes                  
       (AA-Q4B8A-TE)
   DEC3000 AXP MUP 01 OpenVMS AXP Release           
       Notes (AA-Q4B7A-TE)
   DEC3000 AXP MUP 01 DEC OSF/1 Release Notes                 
       (AA-Q42FA-TE)
   DEC3000 AXP MUP 01 Cover Letter                                
       (AV-Q4B9A-TE)

   DEC3000 OpenVMS AXP MUP 01 Cover Letter             
       (AV-Q4M5A-TE)
                      
 FA-05036-01  FA Document