 +_____________________________________________________________________
  AUTHOR:                                          SMS:B26017       
  LEMUEL GRADY           BFS PROGRAM NOTE          DR:109742        
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  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE:            
  BRSS/562 922-3595        RELEASE NOTE ( )        08/31/99         
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  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
  OI26B THROUGH OI28              CREW (X)  GROUND ( )  DUMP ONLY ( )
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            MAJOR SOFTWARE AREA:             OPS MODES AFFECTED:     
 BSL(X) BSS( ) GNC( ) SEQ( ) SM/SP( ) IPL( )     N/A                 
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  SOFTWARE SUB-AREA:  GPC, MMU                                        
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  PRINCIPAL FUNCTIONS: MG018101/3.2.3 & 3.3                           
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  TITLE: INADEQUATE FILTERING OF I/O ERRORS                           
                                                                      
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  DESCRIPTION:                                                        
                                                                      
  THIS DR CONDITION OCCURS WHEN BSL'S ERROR HANDLER PERFORMS          
  INADEQUATE FILTERING OF A POTENTIAL TRANSIENT IOP STATUS-1          
  (GO/NO-GO) I/O ERROR.  WHEN AN I/O ERROR OCCURS, THE ERROR HANDLER  
  WILL NOT IDENTIFY THE ERROR IN ORDER TO RESET THE GO/NO-GO ERROR    
  CONDITION.  ALSO, THE CURRENT JOB LIST IS BEING UPDATED SUCH THAT   
  THE MMU I/O ROUTINE IS RE-SCHEDULED BEFORE THE I/O ERROR IS RESET.  
  COLLECTIVELY, THIS ALLOWS THE INITIAL ERROR TO BE SEEN REPEATEDLY BY
  THE MMU I/O ROUTINE BEFORE A RETRY COULD BE ATTEMPTED.  BECAUSE OF  
  THIS PROBLEM, AN INITIAL TRANSIENT I/O ERROR WILL PREVENT A         
  SUCCESSFUL LOAD OF BFS.                                             
                                                                      
                                                                      
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  USER RESPONSE:                                                      
  WHEN THE BFS LOADING PROCESS IS HALTED BECAUSE OF FOUR CONSECUTIVE  
  ERRORS, THE GPC CAN BE RE-IPLED.                                    
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
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 CONCURRENCE:                           APPROVAL:                    
 BRSS/BFS: <S> D. CORBIN   DATE 09/09/99                             
          ---------------      ---------                             
 CHAIR: KENNETH HILL       DATE 10/14/99                             
       ------------------      --------- DARRELL E. STAMPER 10/18/99 
 PF MGR: DAN WOOD          DATE 09/21/99------------------- -------- 
       ------------------      --------- CHAIRMAN, SASCB      DATE   
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