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VM65945: NEW FUNCTION : CMS SUPPORT FOR EAV MINIDISK

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as new function.

Error description

  • Provide EAV minidisk support in CMS. See also CP APAR VM65943.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Any user installing CP APAR VM65943 / PTF    *
    *                 UM35187 for EAV minidisk support is affected *
    *                 by this CMS change.                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    With the introduction of EAV minidisk support by CP APAR
    VM65943, CMS needs to tolerate EAV minidisks. CMS continues to
    support minidisks of 65519 cylinders or less, thus the CP EAV
    support has no affect on regular CMS minidisk support. There are
    two areas in CMS which need to tolerate the larger EAV minidisk
    support. These areas are
    
    1. MAPMDISK mapping services which allow mindisks to be mapped
       to an address space owned by a virtual machine. EAV minidisks
       defined at or above 65520 cylinders are not allowed.
    
    2. The DIRMAP command needs to recognize minidisks defined with
       a size of 65520 or larger.
    

Problem conclusion

Temporary fix

Comments

  • The CMS support for EAV minidisks consists of updating the
    MAPMDISK mapping services and the DIRMAP command to tolerate
    minidisks defined at or above 65520 cylinders.  The changes
    consist of
    
    1. CP does not support MAPMDISK IDENTIFY for an EAV minidisk
       that is defined at or above 65520 cylinders on a DASD
       volume. Because of this restriction, the CMS Shared File
       System (SFS) server was updated to detect this new error
       condition in the use of data spaces. Any user storage group
       minidisk in the file pool that resides on an EAV minidisk
       must have the end extent of the minidisk below 65520
       cylinders in order for the server to be able to create and
       use data spaces. You will receive a warning message if all
       or part of any minidisk resides at or above 65520 cylinders.
       Server processing continues, but any attempt to access any
       data space eligible directory in the file pool will result
       in no data space being created.
    
    2. The DIRMAP command is updated to allow the mapping of any
       3390 minidisk up to 1,182,006 cylinders.
    
    The following publications have been updated to reflect
    these changes:
    
       GC24-6161 z/VM: CMS and REXX/VM Messages and Codes
         - Message DMS3072W is updated to reflect data space
           restrictions on an EAV.  The DMS3072W HELPMSG is
           updated with this change.
       SC24-6166 z/VM: CMS Commands and Utilities Reference
         - Usage note 2 in Table 1 under the DIRMAP command
           is updated to account for EAV. The DIRMAP HELPCMS is
           updated with this change.
       SC24-6167 z/VM: CMS File Pool Planning, Administration,
                       and Operation
         - Added a new section to Chapter 14. "Using Data Spaces":
           "Restrictions for Using Data Spaces on Extended Address
           Volume (EAV) Minidisks."  This new restiction states
    
             Any user storage group minidisk in the file pool
             that resides on an Extended Address Volume (EAV)
             minidisk must have the end extent of the minidisk
             below 65520 cylinders in order for the server to
             be able to create and use data spaces. You will
             receive a warning message if all or part of any
             minidisk resides at or above 65520 cylinders.
             Server processing continues, but any attempt to
             access any data space eligible directory in the
             file pool will result in no data space being
             created.
    
    3. The STSIUSE sample EXEC is updated to add the Firmware
       Identifier to STSI 1.1.1 output
    

APAR Information

  • APAR number

    VM65945

  • Reported component name

    VM CMS

  • Reported component ID

    568411201

  • Reported release

    640

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2016-12-02

  • Closed date

    2017-08-18

  • Last modified date

    2018-12-14

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

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

    UM35204

Modules/Macros

  • DIRMAP   DMS3BC   DMS3072W DMS4FK   DMS5GD   DTRYDIR  STSIUSE
    

Fix information

  • Fixed component name

    VM CMS

  • Fixed component ID

    568411201

Applicable component levels

  • R640 PSY UM35204

       UP17/08/28 P 1802  

Fix is available

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Document information

More support for: z/VM family

Software version: 640

Operating system(s): z/VM

Reference #: VM65945

Modified date: 14 December 2018