High Impact / Highly Pervasive APAR IJ53478 VIO client I/O may hang or fail

Notification

Risk classification

HIPER (High Impact and/or Pervasive)

Risk categories

System Outage

Affected Domain

VIOS 4.1.1.0

Abstract

VIO client I/O may hang or fail

Description

On VIOS 4.1.1.0, VIO client I/O may hang, escalating to path loss and potential I/O failures. We have seen this mainly with Linux clients running high I/O workloads, including SAP HANA.

Recommended Action

Affected VIOS Levels and Recommended Fixes

Minimum Affected Level	Maximum Affected Level	Fixing Level	Interim Fix
VIOS 4.1.1.0 devices.vdevice.IBM.vfc-server.rte 7.3.3.0	VIOS 4.1.1.0 devices.vdevice.IBM.vfc-server.rte 7.3.3.0	VIOS 4.1.1.10 IJ53478	iFix

This table describes which active levels are affected and where to obtain fixes.
Before the APAR fix is available, an interim fix (iFix) is available for each affected level.
The available interim fixes might apply only to the latest Service Packs. If a custom interim fix is required, contact IBM Support.
The interim fixes can be downloaded using HTTPS.

Verify you have retrieved the fixes intact:

The checksums below were generated using the "openssl dgst -sha256 [filename]" command as the following:

openssl dgst -sha256	filename
65d1a61327a844a176ae40fd73ac1c85647b8a31de3417239f1db5c6726f1144	IJ53478s0c.250210.VIOS4.1.1.0.epkg.Z

For information on how to securely verify AIX/VIOS fixes: https://www.ibm.com/support/pages/node/6985269

Date first published

24 March 2025

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