PH13373: PROVIDE LBI SUPPORT

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• Provide LBI support for Enterprise PL/I for z/OS run-time
  library.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Enterprise PL/I for z/OS users of tape files *
  ****************************************************************
  * PROBLEM DESCRIPTION: This APAR provides the run-time changes *
  *                      for large block interface support.      *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF for this APAR.                 *
  ****************************************************************
  This APAR provides the run-time changes for large block
  interface (LBI) support.
  

Problem conclusion

Temporary fix

Comments

• This APAR provides the run-time changes for PL/I large block
  interface (LBI) support.
  
  The following changes will be made to the Enterprise PL/I for
  z/OS Programing Guide, GI13-4536:
  
  Add the following new section to
    chapter "Using data sets and files"
    section "Establishing data sets and characteristics"
    subsection "Specifying characteristics in the ENVIRONMENT
                 attribute"
  
    Taking advantage of LBI:
  
    You can improve the performance of tape data sets by using the
    large block interface (LBI) for large block sizes. For tape
    devices that support LBI, PL/I uses this facility which allows
    block sizes to exceed 32760.
  
    LBI is not supported for spanned or UPDATE files. In addition,
    PL/I does not provide LBI support for U-format files. LBI is
    only supported in 31-bit mode.
  
    Using a block size that exceeds 32760 might result in your not
    being able to read the tape on another system. A tape that you
    create with a block size greater than 32760 can be read only
    on a system that has a tape device that supports block sizes
    greater than 32760. If you specify a block size that is too
    large for the file, the device, or the operating system level,
    a runtime message is issued.
  
  PUBS CLOSING CODE: DEVCHNG
  

APAR Information

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

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

  UI70420

Modules/Macros

• IBMPOIOA IBMPOPFA
  

Fix information

• Fixed component name

  LE VA PL/I

• Fixed component ID

  568819806

Applicable component levels

• R7C0 PSY UI70420

     UP20/07/08 P F007

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.