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Chris Gibson's AIX and PowerVM blog.
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Defining a new Network Install Interface on a NIM master.

cggibbo 270000TMUJ | | Visits (26508)

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OK, so I had a NIM master with two network interfaces, en0 and en1. The en0 interface was connected to the 192.168.10.0 network and the en1 interface was   connected to the 10.1.1.0 network. When the master was initially configured, we chose en0 as the primary install interface. The master could now install NIM clients on the 192.168.10.0 network, without any additional NIM network configuration.   root@nim1 / # ifconfig –a en0:... [More]

Tags:  new gibson network install nim installation chris interface manager aix

A letter from Pavel Hampl - LPAR2RRD creator.

cggibbo 270000TMUJ | | Comment (1) | Visits (10997)

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Interested in paid support for LPAR2RRD tool?   Let’s all support Pavel and spread the word!   From: Pavel Hampl < pavel.hampl@cz.ibm.com > Date: 21 July 2011 3:00:19 AM AEST To: undisclosed-recipients:; Subject: LPAR2RRD professional support announcement Hi Everyone, You are receiving that mail because we have been either in touch in regards of LPA2RRD tool about year ago or you are on LPAR2RRD mailing list. I’ve decided to make professional paid support of LPAR2RRD. Here are my reasons which led me to that thought: - I have not... [More]

Tags:  lpar2rrd chris aix gibson

Convert rootvg JFS file systems to JFS2 with alt_disk_copy

cggibbo 270000TMUJ | | Comments (2) | Visits (16623)

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Starting with AIX 6.1 (TL4?), you can use the alt_disk_copy command to convert rootvg file systems from jfs to jfs2. The man page for the alt_disk_copy command states the following:   -T Indicates that you want to convert JFS file systems to JFS2 file systems during the process of recreating the rootvg volume group on target disks.   As an example, to clone a running systems rootvg to hdisk2, and convert the rootvg file systems from JFS to JFS2, you would run the following command:   # alt_disk_copy -T -d hdisk2   Good to know!  

Tags:  alt_disk_copy chris convert jfs2 aix gibson jfs

HSCLA27C, reserve_policy and LPM validation error.

cggibbo 270000TMUJ | | Comments (5) | Visits (17972)

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A customer was attempting to move an LPAR from one POWER7 750 to another POWER7 750 using Live Partition Mobility (LPM). But he was receiving the following error message when performing an LPM validation.     This was an easy one to fix. The reserve policy on the hdisk on the VIOS (yes, it was a single VIO server not dual VIOS, don’t ask why!) was set to PR_exclusive instead of no_reserve.   $ lsmap –vadapter vhost0 SVSA             Physloc                                       Client Partition ID... [More]

Tags:  aix live mobility lpm partition gibson reserve_policy hscla27c chris

Creating a CAA cluster on AIX 7.1.

cggibbo 270000TMUJ | | Visits (29876)

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In this post I’ll demonstrate how to create a Cluster Aware AIX (CAA) cluster on AIX 7.1. I’ll create a simple two-node CAA cluster. I’ll then check the cluster status and, finally, remove the cluster.   Before I start, I make sure that both nodes have entries in /etc/hosts on both systems.   node1[/] > grep node /etc/hosts 172.29.134.169   node1 172.29.152.160   node2   node2[/] > grep node /etc/hosts 172.29.134.169   node1 172.29.152.160   node2   I verify that cluster services are not active on both nodes.   node1[/tmp/cg]... [More]

Tags:  creating mkcluster lscluster caavg_private caa 7.1 cluster chris gibson aware creation aix

JFS2 logging disabled during mksysb restore.

cggibbo 270000TMUJ | | Comment (1) | Visits (13015)

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While attending the IBM Power Systems Symposium this week, I learnt that starting with AIX 7.1 (and AIX 6.1 TL6) JFS2 logging is disabled during a mksysb restore. You may be familiar with disabling JFS2 logs, if not, take a look at this IBM technical note:   https://www-304.ibm.com/support/docview.wss?uid=isg3T1012643   I’ve been unable to find any official documentation from IBM that mentions this new enhancement to the mksysb restore process. However, when I checked my own AIX 7.1 system I found the following statement/code in the... [More]

Tags:  mksysb disabled log=null logging jfs2 chris aix gibson

Querying the Cluster Aware AIX solidDB database.

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Did you know that you can connect to and query the new solidDB database used by Cluster Aware AIX (CAA)?   You can connect to the solidDB instance and issue SQL queries against the database. In the following example, I issued two queries: one to list the tables in the database and another to query information relating to the nodes in the cluster. The formatting in the second query is a mess, but you get the idea.   root@node1:/> /opt/cluster/solidDB/bin/solsql -x pwdfile:/etc/cluster/dbpass 'tcp localhost 2188' caa IBM solidDB SQL... [More]

Tags:  soliddb solsql aware gibson caa chris /opt/cluster/soliddb/bin/... cluster aix

How much memory or CPU will that CoD code activate anyway?

cggibbo 270000TMUJ | | Comments (11) | Visits (34888)

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This little tip was passed on to me by a friendly IBM hardware engineer many years ago.   When entering a capacity on demand (CoD) code into a Power system, you can tell how many processors and how much memory will be activated, just by looking at the code you’ve given by IBM.   For example, the following codes, when entered for the appropriate Power system, will enable 4 processors (POD) and 64GB of memory (MOD). I can also tell* that once the VET code is entered, this system will be licensed for PowerVM Enterprise Edition (2C28).  ... [More]

Tags:  cod power gibson mod aix activation demand pod capacity chris code on vet powervm

lsdevinfo

cggibbo 270000TMUJ | | Visits (14824)

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The lsdevinfo utility appears to an undocumented command. However it looks like it could come in handy occasionally. Here are some examples of using it on AIX 7.1:   # oslevel -s 7100-00-01-1037   # lslpp -w /usr/sbin/lsdevinfo   File                                         Fileset                Type   ----------------------------------------------------------------------------   /usr/sbin/lsdevinfo                          bos.rte.methods        File   # lsdevinfo -h   Usage: lsdevinfo [-q Criteria] [-F Format] [-R] [-c] [-h]  ... [More]

Tags:  chris aix gibson lsdevinfo

Configuring AIX as an iSCSI target.

cggibbo 270000TMUJ | | Comments (4) | Visits (35913)

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Configuring AIX as an iSCSI target.   On the iSCSI target host (server).   Host is running AIX 7.1.   Install the devices.tmiscsw.rte fileset. This fileset can be found on the AIX 7.1 Expansion Pack CD.   l273pp043_pub[/] > oslevel -s 7100-00-02-1041   l273pp043_pub[/] > lslpp -l devices.tmiscsw.rte   Fileset                      Level  State      Description   ---------------------------------------------------------------------------- Path: /usr/lib/objrepos   devices.tmiscsw.rte        7.1.0.0  COMMITTED  iSCSI Target... [More]

Tags:  iscsi target chris aix gibson

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

cggibbo 270000TMUJ | | Comments (4) | Visits (45319)

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There are two new HMC (V7.7.3.0) commands that can force a client Virtual Fibre Channel adapter to log into a SAN. This should make the life of the AIX and SAN administrator easier, as they will no longer need to install AIX in order for the new VFC adapters to log into the SAN. Although there was an unsupported method* for doing this already (see links below). Nor will the SAN admins need to “blind” zone the WWPNs.   There was some indication of this in the latest VIOS FP readme:  ... [More]

Tags:  virtual chnportlogin aix gibson lsnportlogin channel npiv adapter chris fibre

VSCSI hdisk path priority - which path am I using?

cggibbo 270000TMUJ | | Comments (5) | Visits (40123)

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Here’s a question I received recently, that relates to virtual SCSI hdisk path priority.   Hi, Chris, I use MPIO for our virtualization environment. I'd like to check which path is currently used. How can I get the result? For example:   [nim:/]# lspath Enabled hdisk0 vscsi0 Enabled hdisk0 vscsi1 Enabled hdisk2 vscsi2 Enabled hdisk1 vscsi1 Enabled hdisk1 vscsi0 Enabled hdisk3 vscsi2 Enabled hdisk2 vscsi3 Enabled hdisk3 vscsi3   How can I determine vscsi0 or vscsi1 is currently carrying data through VIOS and VIOC. Thanks a lot!   By default... [More]

Tags:  priority aix hdisk gibson vios vscsi chris

IVM and VLAN Tagging

cggibbo 270000TMUJ | | Comments (9) | Visits (38526)

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I was working with a customer recently on a Power Blade that was running the Integrated Virtualisation Manager (IVM). They’d installed a VIO partition onto the Blade and had hoped to install a couple of AIX LPARs on the system. However they didn’t get very far.   As soon as they attempted to NIM install the LPARs, they would get stuck at trying to ping the NIM master from the client. Basically, the Shared Ethernet Adapter (SEA) was not working properly and none of the LPARs could communicate with the external network. So they asked for... [More]

Tags:  ivm chhwres vlan lshwres tag aix vios sea

Working with AIX scalable volume groups.

cggibbo 270000TMUJ | | Comments (4) | Visits (46257)

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Scalable volume groups first appeared in AIX 5.3. They allow a maximum of 1024 physical volumes and 4096 logical volumes per volume group. This is pretty cool for large systems. In the ‘old days’ we could end up in situations where we’d reached the maximum PV count (32 or 128) for a VG and have to create a new VG to work around the issue.   I use scalable VGs for all my new large AIX system builds.   The following command will create a scalable VG (named svg ) on hdisk4. You’ll notice that MAX PVs is set to 1024 and MAX LVs is set to 256.... [More]

Tags:  gibson aix vg manager lvm pv chris chvg hdisk max physical lv scalable groups group mkvg logical volume

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

cggibbo 270000TMUJ | | Visits (37599)

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Following on from my previous post, on working with scalable VGs.   https://www.ibm.com/developerworks/mydeveloperworks/blogs/cgaix/entry/working_with_aix_scalable_volume_groups1?lang=en   You may find yourself in a situation where you’d like to convert a VG to scalable.   For example, you might start off with a normal VG i.e. one that can support a maximum of 256 LVs and 32 PVs.   # mkvg -s 512M -y myvg hdisk5 myvg   # lsvg myvg VOLUME GROUP:        myvg                      VG IDENTIFIER:   00f6027300004c0000000133aa24d1f6 VG STATE:... [More]

Tags:  aix lvm chvg pv gibson convert -g mkvg manager hdisk scalable chris conversion group groups volume max vg physical lv logical
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