Chris's AIX Blog

PLEASE NOTE: On December 31st 2019 the IBM DeveloperWorks Connections Platform was sunset. As a result, my blog (Chris’s AIX Blog), https://www.ibm.com/developerworks/community/blogs/cgaix, was decommissioned.

I was able to save all the blog posts (from the last 10 years). They now reside here on my personal blog (see list below).

I continue to create new blog posts. They will also appear in the list below.

If you have comments about any of the posts, please contact me on Twitter @cgibbo. Or email me aix@gibsonnet.net.

Thanks for your continued support of my AIX blog.

Regards,

Chris Gibson

Maximum value for num_cmd_elems on AIX

Published: November 4th 2019

Using svmon to display available memory on AIX

Published: October 21st 2019 – First post on new blog. After DW sunset.

MDS reports

Originally Published: September 18th 2014

Displaying WWPN information on POWER9 Systems

Originally Published: August 21st 2019

One Path Control Module to Rule Them All!

Originally Published: July 27th 2018

Testing AIX Live Update Across Power Systems Frames

Originally Published: July 8th 2019

Chris’s AIX Live Update Best Practices

Originally Published: May 17th 2018, Updated: January 6th 2020

Tip Rebooting with AIX LVM Mirroring and Dual VIO Servers

Originally Published: June 7th 2019

Configuring Native SR-IOV on AIX with Link Aggregation

Originally Published: May 21st 2019

Replicated rootvg, ghostdev and NPIV

Originally Published: May 21st 2019

AIX logins slow to prompt for password - KRB5files OR compat

Originally Published: April 26th 2019

How to use the VIOS VML to install AIX updates.

Originally Published: April 4th 2019

Live Partition Mobility from the Novalink command line

Originally Published: March 28th 2019

AIX Live Update with CPU Reduction

Originally Published: December 21st 2018

How do I use the viosupgrade tool to upgrade to VIOS 3.1

Originally Published: November 16th 2018

AIX JFS file systems and 4k disks

Originally Published: November 21st 2018

Kubernetes on AIX! Did you say AIX

Originally Published: November 1st 2018

AIX SUMA in 2018

Originally Published: October 22nd 2018

AIX 7.2 running on my Macbook

Originally Published: October 9th 2018

AIX SMT mode on POWER9 with AIX 7.2 TL3 SP1

Originally Published: September 26th 2018

Prevent PowerHA from starting at boot

Originally Published: September 5th 2018

Examine PowerHA log files for errors with clanalyze

Originally Published:August 1st 2018

Using Terraform with PowerVC to deploy new AIX VMs

Originally Published: July 6th 2018

Migrating a Versioned WPAR to AIX 7.2

Originally Published: June 26th 2018

Updating your PowerHA cluster with cl_ezupdate

Originally Published: January 18th 2018

Cloud Ready AIX Images

Originally Published: December 14th 2017

OpenSSH 7.0 & greater disable ssh-dss by default.

Originally Published: September 12th 2017

Simplifying AIX Live Update with PowerVC

Originally Published: October 11th 2017

Has your IBM XL CC++ for AIX software evaluation license expired

Originally Published: June 23rd 2011

DLPAR not doing it for you anymore

Originally Published: February 25th 2011

In a perfect world....rootvg would always reside on hdisk0.

Originally Published: October 19th 2012

nimsh and SAP

Originally Published: June 10th 2011

AIX sudo no tty present and no askpass program specified

Originally Published: August 18th 2017

Quick start guide to configuring PowerSC RTC on AIX

Originally Published: August 3rd 2017

Investigating AIX system crashes with minidump

Originally Published: July 10th 2017

How to live update your AIX system without rebooting the server.

Originally Published: October 26th 2016

Automatically backup VIOS configuration changes

Originally Published: May 10th 2017

AIX rootvg failure monitoring

Originally Published: March 2nd 2017

Migrating you NIM Master to AIX 7.2 using the VIOS VML

Originally Published: May 4th 2017

AIX, LPM & Partition ID sorcery! Why does AIX report that my partition ID has changed after LPM when it hasn't

Originally Published: April 7th 2017

A journey into the world of VLAN tagging and Virtual IO!

Originally Published: October 27th 2010

NIM Master, NIMSH and SSL on AIX 7.1 TL4 SP3

Originally Published: February 8th 2017

j2pg high CPU usage on AIX

Originally Published: January 20th 2017

Minimum memory requirement for AIX 7.2 Live Update

Originally Published: December 6th 2016

Is large send offload enabled on my AIX system

Originally Published: December 2nd 2016

DLPAR event history on the HMC

Originally Published: December 2nd 2016

AIX WPAR tips and tricks

Originally Published: November 28th 2016

What are those AIX fcstat error numbers all about

Originally Published: November 17th 2016

Hacking cloud-init on AIX.

Originally Published: September 14th 2016

Running the PowerVP GUI Server on AIX.

Originally Published: September 5th 2016

Running the Virtual HMC on your Apple MacBook Pro.

Originally Published: August 30th 2016

Using NIM to distribute files to your AIX servers.

Originally Published: August 22nd 2016

New HMC commands chnportlogin and lsnportlogin - Login in Virtual Fibre Channel adapters for NPIV client LPARs.

Originally Published: September 15th 2011

AIX DSO on POWER8

Originally Published: May 25th 2016

NIMSH, SSL and LPM.

Originally Published: May 2nd 2016

New HMC system wide setting - Allow Migration with Inactive Source Storage VIOS

Originally Published: April 18th 2016

Never say never....AIX 5.3 on POWER8.

Originally Published: March 8th 2016

Is that a versioned WPAR I see before me

Originally Published: December 16th 2015

Open a HMC LPAR console from the AIX command line using dconsole!

Originally Published: December 14th 2015

NIM - ...the resource is currently allocated for client use - er, NO it's not!

Originally Published: November 26th 2015

NIM support for installing AIX updates and new packages over HTTP

Originally Published: November 18th 2015

Help! My mksysb is only backing up 4 files!

Originally Published: October 29th 2015

AIX Live Update using NIM

Originally Published: October 23rd 2015

AIX LVM Mirroring enhancement for Flash Preferred Read

Originally Published: October 14th 2015

AIX Live Update - No Reboot Required! Non-disruptive OS Updates!

Originally Published: October 5th 2015

poll_uplink and PowerHA tip

Originally Published: August 10th 2015

Installing and using PowerVP on AIX

Originally Published: July 28th 2015

Queue depth setting in a Versioned WPAR on AIX

Originally Published: April 30th 2015

Restoring a Versioned WPAR with NIM

Originally Published: April 24th 2015

SSH delay with security.pkcs11 installed.

Originally Published: January 15th 2015

SSP and Disaster Recovery (Tech Preview)

Originally Published: December 19th 2014

Managing an existing AIX virtual machine with PowerVC

Originally Published: December 2nd 2014

AIX snap - Prevent dump collection

Originally Published: November 12th 2014

Where'd DLPAR go in HMC V8R8.1.0.1

Originally Published: November 11th 2014

Collecting PowerVP system level data from the AIX command line.

Originally Published: October 29th 2014

Running AIX 5.3 on POWER8.

Originally Published: October 17th 2014

Tips and tricks with dsh on AIX

Originally Published: August 6th 2014

Use entstat to view AIX Virtual Ethernet Link Status

Originally Published: July 14th 2014

Display VCPU affinity with PowerVP

Originally Published: July 8th 2014

AIX Virtual Ethernet Link Status

Originally Published: March 25th 2014

Installing PowerVP Service Pack 1

Originally Published: February 17th 2014

Thanks kdb but lsattr's got me covered!

Originally Published: December 23rd 2013

Consistent mksysb backups using JFS2 snapshots

Originally Published: December 2nd 2013

LPM and viosecure

Originally Published: November 15th 2013

New FC adapter port queue depth tuning

Originally Published: November 7th 2013

Troubleshooting AIX hdisk configuration errors

Originally Published: October 31st 2013

seastat search option

Originally Published: November 20th 2012

System Copy WPARs

Originally Published: October 11th 2013

New VIOS tunables with v2.2.2.2.

Originally Published: September 20th 2013

rsh is dead, long live nimsh!

Originally Published: August 27th 2013

Using chhwres to free up partition resources.

Originally Published: August 26th 2013

VIOS advisor SEA report

Originally Published: August 5th 2013

Using nimadm on multibos enabled NIM masters

Originally Published: August 12th 2013

Creating new file systems in AIX Don't edit etcfilesystems by hand!

Originally Published: July 19th 2013

Understanding viostat -adapter vfchost output - Part Two.

Originally Published: June 3rd 2013

Displaying HMC DLPAR operations history

Originally Published: April 24th 2013

Understanding viostat -adapter vfchost output.

Originally Published: April 12th 2013

The new VIOS performance advisor tool

Originally Published: January 18th 2013

My root volume group is called old_rootvg....HELP!!

Originally Published: February 22nd 2013

Testing Scaled Throughput mode with AIX 7.1 on POWER7.

Originally Published: December 21st 2012

Updating your NIM master to AIX 7.1 TL2 Take note!

Originally Published: December 12th 2012

Multibos saved my bacon!

Originally Published: November 1st 2012

AME activation key identification

Originally Published: October 5th 2012

kdb and fscsi attributes

Originally Published: September 3rd 2012

AIX 7.1 – DSM dgetmacs.

Originally Published: December 24th 2010

SSH Host keys and AIX 7.1 Migration.

Originally Published: August 22nd 2012

SMS SAN zoning support

Originally Published: August 2nd 2012

New virtual Ethernet adapter attribute for largesend on AIX

Originally Published: July 23rd 2012

Convert rootvg file systems to JFS2 using alt_disk_copy

Originally Published: July 9th 2012

DLPAR and AIX 5.3

Originally Published: June 29th 2012

Using a post-migration script with nimadm

Originally Published: June 15th 2012

Make sure you monitor file system space on your VIOS.

Originally Published: June 1st 2012

Tuning Virtual Ethernet adapters for (even) better backup performance.

Originally Published: May 15th 2012

Checking num_cmd_elems for VFC adapters with kdb

Originally Published: May 3rd 2012

VLAN tagging and the VIOS some questions and answers.

Originally Published: March 16th 2012

Managing users with dsh and chpasswd - (plus info on DSM and dping).

Originally Published: March 30th 2012

PowerHA lssrc and clinfoES

Originally Published: March 23rd 2012

Does AIX support passwords longer than 8 characters Yes!

Originally Published: March 9th 2012

More NIM troubleshooting....some basics...

Originally Published: March 2nd 2012

Can't change max_transfer for a VSCSI hdisk Check your vtopt devices!

Originally Published: February 7th 2012

Upgrading PowerHA Don't forget your TSM client!

Originally Published: January 30th 2012

Flicking through the latest AIX enhancements.

Originally Published: January 23rd 2012

Check your WPAR filesets

Originally Published: January 16th 2012

Checking your queue depth with kdb.

Originally Published: December 19th 2011

nimadm - multibos error!

Originally Published: December 5th 2011

Working with AIX scalable volume groups - Part 2 - converting to scalable.

Originally Published: November 23rd 2011

lpar2rrd error - Can't use string () as a SCALAR ref..lpar2rrd.pl line 533

Originally Published: November 29th 2011

Working with AIX scalable volume groups.

Originally Published: November 15th 2011

IVM and VLAN Tagging

Originally Published: November 8th 2011

VSCSI hdisk path priority - which path am I using

Originally Published: October 6th 2011

How much memory or CPU will that CoD code activate anyway

Originally Published: August 29th 2011

Configuring AIX as an iSCSI target.

Originally Published: September 9th 2011

lsdevinfo

Originally Published: September 5th 2011

Querying the Cluster Aware AIX solidDB database.

Originally Published: August 17th 2011

JFS2 logging disabled during mksysb restore.

Originally Published:

Creating a CAA cluster on AIX 7.1.

Originally Published: August 15th 2011

HSCLA27C, reserve_policy and LPM validation error.

Originally Published: August 8th 2011

Migrating to AIX 7.1 with nimadm.

Originally Published: January 28th 2011

Convert rootvg JFS file systems to JFS2 with alt_disk_copy

Originally Published: July 26th 2011

A letter from Pavel Hampl - LPAR2RRD creator.

Originally Published: July 21st 2011

Defining a new Network Install Interface on a NIM master.

Originally Published: July 19th 2011

nmon, AIX and iscsi0

Originally Published: July 11th 2011

0516-966 reorgvg Unable to create internal map and LVM logging.

Originally Published: June 17th 2011

Updating AIX Virtual SCSI adapter attributes without an outage

Originally Published: July 5th 2011

Is there a way to find on which processor a process is executing

Originally Published: July 1st 2011

mkwpar, truss and coffee!

Originally Published: May 16th 2011

0042-358 niminit The connect attribute may only be assigned a service value of shell or nimsh.

Originally Published: April 20th 2011

Experience with RootVG WPARs

Originally Published: April 19th 2011

Collecting WWPNs for new Virtual Fibre Channel Adapters

Originally Published: March 27th 2011

AIX Double Boot!

Originally Published: March 1st 2011

DLPAR not doing it for you anymore

Originally Published: February 25th 2011

AIX multibos mksysb migration

Originally Published: February 22nd 2011

New AIX Service and Release Strategy - Starting February 2011

Originally Published: February 10th 2011

Virtual IO Server and DS5020 disk.

Originally Published: February 8th 2011

VIOSAIX Matrix

Originally Published: January 27th 2011

Is my POWER7 system AME capable Is AME supported with SAP in production

Originally Published: December 10th 2010

AIX performance tool enhancements - Filtered output and XML reports

Originally Published: November 26th 2010

The next generation Virtual IO Server!

Originally Published: October 29th 2010

Cluster Aware AIX

Originally Published: October 21st 2010

Renaming devices in AIX 7.1

Originally Published: September 26th 2010

AIX or Linux on POWER

Originally Published: August 18th 2010

AIX 6.1 resolv.conf and netcd.

Originally Published: January 28th 2010

A 'first look' at creating an AIX 5.2 WPAR on AIX 7.

Originally Published: July 28th 2010

rmsock on AIX.

Originally Published: July 24th 2010

AIX 7 Open Beta is live - it's time to test!

Originally Published: July 14th 2010

saposcol and shared memory on AIX.

Originally Published: July 9th 2010

Shared Ethernet Adapter accounting tool.

Originally Published: May 6th 2010

My LPAR always boots into SMS. Why

Originally Published: July 1st 2010

catman -w on AIX.

Originally Published: June 30th 2010

nohup -p on AIX.

Originally Published: June 1st 2010

Monitoring Multiple Shared Processor Pools with topas.

Originally Published: May 18th 2010

New Features in AIX Version 7.

Originally Published: April 13th 2010

Using the AIX splitvg command.

Originally Published: March 31st 2010

Live Partition Mobility IBM Wiki site.

Originally Published: March 15th 2010

AIX 6.1 migration iostat and maxuproc change to their defaults

Originally Published: March 1st 2010

My first POWER7 LPAR.

Originally Published: February 10th 2010

Paging Device Considerations for AMS ( Active Memory Sharing ) with LPM ( Live Partition Mobility).

Originally Published: February 5th 2010

The new chkdev command for VIOS 2.1.

Originally Published: January 19th 2010

Setting Up A Network To Improve Live Partition Mobility Performance

Originally Published: January 21st 2010

VIOS 2.1 FP22 and VMLibrary.

Originally Published: January 15th 2010

Backing up your VIOS configuration with viosbr.

Originally Published: December 10th 2009

Unusual bosboot messages.

Originally Published: December 7th 2009

LPM ifix for JS22 blades and IVM.

Originally Published: November 17th 2009

hd11admin is created as jfs instead of jfs2

Originally Published: November 10th 2009

chlv AIX 6.1 TL4 - Change an LV name online.

Originally Published: November 5th 2009

Installing the AIX Runtime Expert.

Originally Published: November 5th 2009

New resolv.conf options in AIX 6.1

Originally Published: October 21st 2009

fatal PRNG is not seeded.

Originally Published: October 21st 2009

NIM crash 888-102-700-0c5

Originally Published: September 7th 2009

tftpd is nobody!

Originally Published: August 19th 2009

0653-902 Cannot open the specified file for reading.

Originally Published: July 29th 2009

Who cored

Originally Published: July 22nd 2009

If I run lparstat on a blade LPAR I don't see the app field!

Originally Published: July 14th 2009

AIX migration tools - enhancments

Originally Published: July 7th 2009

Online quorum change

Originally Published: July 10th 2009