A fix is available
APAR status
Closed as program error.
Error description
An unplanned Hyperswap occurred on a multi-path device when recovery I/O directed to one path on that device received a CC3. The I/O should have been tried on all the paths before a hyperswap is initiated.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All z/VM users of GDPS Hyperswap * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** A multi-path device was experiencing problems on one of its channel paths. During error recovery an unplanned hyperswap occurred due to a CC3 received on recovery I/O directed to only one of the paths. The recovery I/O should be tried on all available paths before determining whether to Hyperswap.
Problem conclusion
Error recovery for a CC3, HCPERRD3, was modified to not invoke a hyperswap for recovery I/O directed to one path for a multi- path device. The recovery I/O will be allowed to execute on all available paths before a determination is made on whether (or not) to Hyperswap.
Temporary fix
********* * HIPER * ********* FOR RELEASE VM/ESA CP/ESA R640 : PREREQ: NONE CO-REQ: NONE IF-REQ: NONE FOR RELEASE VM/ESA CP/ESA R710 : PREREQ: NONE CO-REQ: NONE IF-REQ: NONE
Comments
APAR Information
APAR number
VM66231
Reported component name
VM CP
Reported component ID
568411202
Reported release
640
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-11-29
Closed date
2018-12-05
Last modified date
2020-05-20
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM35408 UM35409
Modules/Macros
HCPERR
Fix information
Fixed component name
VM CP
Fixed component ID
568411202
Applicable component levels
Fix is available
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Document Information
Modified date:
21 May 2020