_ DEC-O-LOG for KN15-BA

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

DEC 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.

FIELD EFFECTIVITY:  This is an as needed FCO 
and should only be used on DEC 3000 AXP Model 
400/400S systems that meet ALL the following crite
ria: 
1. The system is exhibiting the symptoms described      
     below.
2. The system module (54-21149-02) is below revision       
    level H09 for D etch modules or H10 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 (54-21149-02) with a new sys
tem module - which will be, at a minimum, revision 
H09 D etch, or H10 F etch.

QUICK CHECK:   The system module (54-21149-02) 
is at revision level H09 for D etch or H10 for F etch 
modules and the system complies with the 3 criteria 
listed above.
 
FCO KIT ORDERING
EQ-01678-01	54-21149-02 System Module   
                (Rev H*)   		
FA-05014-01	FCO Field Applicability 
                Document (FA)


_ DOL, KN15-BA-F003, SCSI controller transaction error

KN15-BA-F003     

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