04/18/95
 
  LV Problems After Migration from AIX 3.2 to 4.1.2
 
 
 
  SPECIAL NOTICES
 
       Information in this document is correct to the best of our
       knowledge at the time of this writing.  Please send feedback
       by fax to "AIXServ Information" at (512) 823-4009.
 
       Please use this information with care.  IBM will not be
       responsible for damages of any kind resulting from its use.
       The use of this information is the sole responsibility of
       the customer and depends on the customer's ability to eval-
       uate and integrate this information into the customer's
       operational environment.
 
  ABOUT THIS DOCUMENT
 
       After a migration install from AIX 3.2 to 4.1.2, there may
       be problems with the creation or extension of a logical
       volume.  This document describes the problem, how it can be
       avoided before migration, and how it can be fixed after
       migration.
 
  THE PROBLEM
 
       There is a problem in migration installation from AIX 3.2
       (any level) to AIX Version 4.1.2 which can cause errors
       similar to the following when the system administrator
       attempts to increase the size of /tmp or create a new
       logical volume or file system.
 
          0516-022 lcreatelv: Illegal parameter or structure value.
          0516-822 mklv: Unable to create logical volume.
          crfs: 0506-902 Cannot create logical volume.
 
  SYSTEMS AFFECTED
 
       The systems that will encounter the problem are systems on
       which
 
       o   the system dump device is the default (that is,
           "sysdumpdev -l" shows that /dev/hd7 is the dump device
           and has two physical partitions) and
 
       o   /tmp is small enough that migration installation has to
           expand it in order to save the configuration data.
 
  THE SOLUTION
 
       The problem is easy to prevent prior to installation, is
       easy to recover from after installation, and will be fixed
       in the next maintenance release of AIX Version 4.
 
 
 
 
 
 
 
                    LV Problems After Migration from AIX 3.2 to 4.1.2  1
 
 
                                                                04/18/95
 
 
       If the installation has already occurred, use the following
       ancy between the device information in the boot image and
       the LVM data for /tmp.)
          su
          <password>
          lvrelminor hd3
          synclvodm rootvg hd3
       Be sure to use grave (back tic) characters in the syntax for
       the putlvodm command.
  If Installation Has Not Already Occurred
 
       system dump device to be the paging space (normally hd6).
       AIX 4.1 uses paging space as the default dump device; if the
       device is preserved across the migration installation, and
       the chain of events which causes the problem is prevented.
       Use the following command to change the dump device to
       paging space prior to migrating (the parameters given assume
       to installation since the dump would not be recoverable from
       paging space on 3.2.
          sysdumpdev -Pp /dev/hd6
 
 
       Here's the sequence of events in installation that triggers
 
       1.  If it is detected that the dump logical volume was
           unmodified (/dev/hd7 is the dump device and is two par-
           titions), then hd7 is removed and the dump device is set
           to paging space on 4.1.
 
       2.  If /tmp is expanded for migration purposes, the