II06423: INCORRECT DEVICE TYPE ALLOCATION BEING PERFORMED WHEN THERE IS NO UNIT SPECIFIED - DEFAULT UNIT TAKES PRECEDENCE

APAR status

• Closed as canceled.

Error description

• MSGIEF506I occurred stating that there were no storage volumes
  to allocate to temporary datasets, however, there were a number
  of 3380 D/T3380 DASD devices that were online, ready, and
  mounted as storage volumes.  Also, trying to submit a job
  through ISPF received a message indicating that ISPF could not
  allocate the control dataset for the submitted JCL.  Jobs
  submitted through batch worked when specifying temp datasets
  that contained UNIT information on the JCL statement.
  
  Additional Symptoms:
       MsgIKJ56221I Volume necessary to satisfy your request not
                    on system and cannot be mounted .
       MsgIKJ58508I Dataset Not Allocated System or Installation
                    error.
       msgIKJ56223I Space Request Denied by Installation Exit,
                    Installation Exit Reason Code IS X'nnnn'
  
  SVC99 ALLOCATE  RC0218 rc021C msgIEF290E IEF290E EDIT &EDIT
  msgIEF238D
  msgIEF244I - UNABLE TO ALLOCATE xxx UNIT(S)
  msgIEF877E - NEEDS xxx UNIT(S) FOR VOLUME SCRTCH
  
  See Responder's Text of this Info APAR for further information.
  See, also, the responder's Text of OW21591.
  
  Beware: The 'LISTU userid TSO' command may not work on all
  systems, you may need to use 'LISTUSER userid TSO'
  
  Additional Keywords:
       Howto
  

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

• When a DYNAMIC allocation is being performed and UNIT
  information is required but not specified (no DALUNIT text
  unit) then the system defaults the unit required.
       If the dynamic allocation is being done under TSO in
  Foreground, then the system will use the default unit from
  the PSCB (Protected Step Control Block), which may contain
  information from SYS1.UADS or the TSO segment of a security
  system's (such as RACF) file.
       If the PSCB does not contain a default unit OR if the
  dynamic allocation is NOT being done under TSO running in the
  foreground, then:
         - the system will use the default unit specified in the
           ALLOCXX parmlib member (or the allocation default
           CSECT IEFAB445 for pre-MVS 4.1.0 (R410) systems).
    ==>  - For *NON* SMS managed data sets with DISP = NEW or
           MOD, SMS will then OVERRIDE the dynamic allocation
           default unit with the SMS default unit specified in
           the SMS Source Control Data Set (SCDS).
       For batch processing (i.e., JCL DD statement allocations),
  SMS will supply the default unit from the SMS Control Data Set
  for NEW or MOD requests which have no UNIT coded.  You may get
  msgIEF210I when an invalid unit is included in the SMS Source
  Control Data Set or when there is no active SMS configuration.
  
  Summary of the above "where defaults are taken from":
         - SMS-managed dataset
            o dynamic allocation -- ACS routines decide
            o batch   allocation -- ACS routines decide
         - non-SMS-managed dataset
            o dynamic allocation
              + TSO in Foreground -- Default comes from TSO
                                     segment of RACF or other
                                     security system's file, or
                                     SYS1.UADS if no TSO segment,
                                     or SCDS if no SYS1.UADS info,
                                     or ALLOCxx if no SCDS info.
              + all else          -- Default comes from SCDS
                                            EXCEPT
                                  --Default comes from ALLOCxx if:
                                         o  DISP = SHR or OLD, or
                                         o  If no SCDS info
            o batch   allocation  -- default comes from SCDS.
  
  Note to Level 2: If the customer absolutely needs to change the
                   default UNIT value in his ALLOCxx member, see
                   the Scratch Pad for an UNSUPPORTED, USE-AT-
                   YOUR-OWN-RISK method of doing that.  Since
                   there is currently no "SET ALLOC=" command to
                   change any ALLOCxx values, this is the only
                   way such a change can be accomplished.
  
  Note: If the default UNIT parameter which Allocation retrieves
        is invalid (for example if the defaulted UNIT is not in
        the EDT), that defaulted UNIT parameter will be error
        flagged and the allocation failed IF AND ONLY IF that
        UNIT parameter is REQUIRED for the allocation.  If the
        default UNIT is "thrown away" by Allocation (as it would
        be for DISP=SHR or OLD datasets) then the invalid default
        UNIT parameter will not be error flagged.
  
       To verify the SCDS parms, you may enter SMS via ISMF.  You
  must be a Storage Administrator, so you may need to select
  option 0.0 and select #2 for Storage Administrator (versus #1
  for User Mode).  Exit and re-enter ISMF and select option 8,
  CONTROL DATA SET section.  Select option 1 to DISPLAY the
  configuration and the next panel will show the default unit.
  This may be a generic (eg. 3380) or an esoteric (eg. SYSDA).
  You may be seeing an 'error' in device allocation if the
  devices being allocated are not included in the default unit
  group.  This default unit specification is the group of devices
  that will be used when unit info is required but not provided
  on the allocation request.  It does NOT indicate which devices
  SMS is to default to for SMS managed datasets.
       The default unit could also be specified in the ALLOCxx
  parmlib member.  Check this member and look for the
  UNIT NAME(unit-name)  statement and change it accordingly.
  
       You can check for the default RACF UNIT (TSO segment) by
  issuing the 'LISTU userid TSO' command.  This will display
  the UNIT default for the userid.
  
       ISPF has its own default for allocations done via option
  3.2 A (ISPF32 ISPF32A), which is stored in the ISPF Configur-
  ation table.  Information about the IBM-supplied default and
  how to modify it (and other options) using the ISPF Configur-
  ation Utility is discussed in detail in the ISPF Planning and
  Customizing manual (SC28-1298), Chapter 4 (Customizing PDF),
  Section 4.12 (The ISPF Configuration Table).  The keyword whose
  default value you'll want to change is PDF_DEFAULT_UNIT.
  
       Customers who have older systems which do not have the
  ISPF Configuration Table and Utility should contact the IBM
  Support Center and ask for the comparable information for
  older systems which is on the Scratch Pad of this APAR.  It
  is not being included here in the main text of the APAR simply
  to avoid the potential problem of someone thinking that THAT is
  the current information.
  
       For datasets allocated with SDSF, see PN64879.
  

APAR Information

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

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

Fix information

Applicable component levels