APAR status
Closed as program error.
Error description
************************************************************** * USERS AFFECTED: * Systems running the AIX 7100-03 Technology Level * with devices.pciex.df1060e214103404.com at or below * the 7.1.3.49 level, * devices.fcp.disk.rte at or below the * 7.1.3.49 level, * devices.pci.df1000f7.com at or below the * 7.1.3.49 level, and * devices.pci.77102224.com at or below the * 7.1.3.50 level. ************************************************************** * ERROR DESCRIPTION: * On an AIX or VIOS LPAR using a physical Fibre Channel * adapter or Virtual Fibre Channel (NPIV) adapter, with * certain storage devices (see below), if communication * between the LPAR and the storage device is severed and * there are multiple writes to the same block happening at * that time, after the path fails, the driver may retry I/Os * down an alternate path too quickly and data may be written * to the device in a different order than it is completed to * the application, possibly resulting in undetected data loss. * * We have seen this, for example, when testing a link drop by * pulling FC cables between LPARs and storage. * * We have seen this issue occur when testing the following * storage devices: * - IBM Flash Systems * - IBM San Volume Controller (SVC) with caching turned off * for the volume * - IBM Storwize family products with caching turned off * for the volume * * This issue CANNOT occur with the following storage devices: * - IBM DS8000 series * - IBM San Volume Controller (SVC) with caching turned on * for the volume * - IBM Storwize family products with caching turned on * for the volume * - IBM XIV family * - EMC Symmetrix family * * Storage devices not specifically mentioned above should be * assumed to be exposed to this problem. * * This issue also cannot occur when reserve_policy for the * disks is set to single_path. ************************************************************** * RECOMMENDATION: * An interim fix is available from either * ftp://aix.software.ibm.com/aix/ifixes/iv97772/ * https://aix.software.ibm.com/aix/ifixes/iv97772/ * Installation of the ifix requires a reboot. **************************************************************
Local fix
Problem summary
IO errors
Problem conclusion
Addressed errors
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
IV97772
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-07-05
Closed date
2017-07-05
Last modified date
2018-01-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SG11R"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]
Document Information
Modified date:
19 April 2022