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  AUTHOR:                                          DR:              
    L. ORTIZ             PASS PROGRAM NOTE              107138      
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  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE:            
  IBM/713-282-8476         RELEASE NOTE( )             04/13/92     
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  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
     OI-20 AND SUBS               CREW ( )  GROUND (X)  DUMP ONLY ( )
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         MAJOR SOFTWARE AREA:        OPS MODES AFFECTED:             
 SSW ( )  GNC ( )  VU (X)  SM/PL ( )     G9                          
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  SOFTWARE SUB-AREA:    HDA, GTS SPEC                                 
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  PRINCIPAL FUNCTIONS:  V4.6, V5.1.5                                  
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  TITLE:                                                              
              POSSIBLE G9 FAIL-TO-SYNC DURING HDA RESTART             
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  DESCRIPTION:                                                        
                                                                      
                                                                      
                                                                      
     DURING G9, IF HDA PROCESSING IS TERMINATED AND LATER RESTARTED   
     (VIA ITEM 1 AND 2 ON SPEC 100 RESPECTIVELY), A POSSIBLE FAIL-    
     TO-SYNC MAY OCCUR.                                               
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
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 USER RESPONSE:                                                       
                                                                      
     IF A FAIL-TO-SYNC OCCURS AFTER RESTARTING HDA PROCESSING IN      
     G9 REDUNDANT SET OPERATIONS, THE APPROPRIATE FAIL-TO-SYNC        
     RECOVERY PROCEDURES SHOULD BE FOLLOWED.                          
                                                                      
     TO LESSEN THE EXPOSURE TO THIS PROBLEM, THE USER SHOULD AVOID    
     STOPPING AND RESTARTING HDA PROCESSING IN G9 REDUNDANT SET       
     OPERATIONS.                                                      
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 CONCURRENCE:                           APPROVAL:                    
 IBM: PATTI A. THORNTON    DATE 04/21/92                             
     --------------------      ---------                             
 FDSD: ROBERT N. HINSON    DATE 04/22/92                             
      -------------------      ---------WILLIAM J. MOON FOR 04/22/92 
 PF MGR: ERIC C. BINGHAM   DATE 04/21/92------------------- -------- 
        -----------------      --------- CHAIRMAN, SASCB      DATE   
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