It's good on my system.  This is the PTF that last updated it all.  it's 
security / integrity 
so you won't find out much about it. 


++ PTF (UJ09020)        /*                                               
//UJ09020  JOB 5695-09020,SCPX7,MSGLEVEL=(1,1),CLASS=A     */  .         
++VER(Z038) FMID(HOT77C0)                                                
  SUP(AA60361,AA63294,CA57154,CA57870,CA58433,CA63294,UA99527,UJ00876,   
  UJ01516,UJ08514)                                                       
 /*                                                                      
  PROBLEM DESCRIPTION(S):                                                
    OA63294 -                                                            
      INTEGRITY PROBLEM                                                  
                                                                         
  COMPONENT:  5695-SCPX7-HOT77C0                                         
                                                                         
  APARS FIXED:                                                           
    OA63294                                                              
                                                                         
  SPECIAL CONDITIONS:                                                    
    COPYRIGHT:                                                           
      5695-SCPE1 COPYRIGHT IBM CORP. 2022                                
      LICENSED MATERIAL - PROGRAM PROPERTY OF IBM                        
                                                                         
    DOCUMENTATION:                                                       
      update publications SA23-1377-40 and SA23-1377-50 with follow      
      new content:                                                       
      5. Use the z/OS UNIX environmental variable,                       
       _HZC_CHECKSUM_METHOD, to control if SIMD acceleration is used     
       in checksum verification.                                         
      Note                                                               
      If the value of software is set, software-based checksum           
      verification is used. All other values result in the default       
      behavior, which means if hardware supported SIMD, then SIMD        
      acceleration is used.                                              
                                                                         
    ENHANCEMENT:                                                         
      This New Function shall be considered part of the "Program"        
      with which it is associated, and its use is subject to the         
      license terms that govern the Program, as set forth in the         
      ICA,CRA, or equivalent agreement between you and IBM.              
      Additional verbiage describing the enhancement is zlib crc32       
      checksum performance is improved.                                  
                                                                         
    INTEGRITY:                                                           
      INTEGRITY SET:                                                     
        UJ09020                                                          
                                                                         
  COMMENTS:                                                              
      THE FOLLOWING PARTS ARE AFFECTED BY THIS PTF:                      
        HFS      HZCLIBS4                                                
        HFS      HZCLIBSO                                                
        HFS      HZCLIBSX                                                
        HFS      HZCLIBX1                                                
        HFS      HZCLIBX4                                                
        HFS      HZCLIBXX                                                
        HFS      HZCLIBZZ                                                
        HFS      HZCZCONF                                                
        HFS      HZCZLIB                          
        HFS      HZCZLIBZ



Best Regards,

Mark
--
Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS
ITIL v3 Foundation Certified
mailto:[email protected]
Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html






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