A fix is available
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
2023-03-15
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM35204 VM66676
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
Modified date:
16 March 2023