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IV65056: NORMAL MODE OPEN FAILS AFTER DIAGNOSTIC OPEN/CLOSE ON DISK

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APAR status

  • Closed as program error.

Error description

  • If two threads are opening a disk at the same time and
one
of them is using the SC_DIAGNOSTIC flag, it is possible
to
experience an unexpected open failure under certain
timing
conditions.

This problem has been seen in EMC powerPath environments
when
two user processes concurrently try to open the
hdiskpower
device and one of its underlying hdisk devices. When this
problem is hit, powerPath may log EMCP_PATH_DEAD /
EMCP_BUS_DEAD / EMCP_PATH_ALIVE errors in errpt.

Local fix

  • 



Problem summary


    

  • normal mode open call to disk may fail with EACCESS error code

    



Problem conclusion


    

  • code is modifed to fix the timing issue.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV65056
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2014-09-19
    • 

  • Closed date
    2014-09-19
    • 

  • Last modified date
    2015-11-22
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IV61602
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U859745
       UP15/11/22  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            22 November 2015
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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