Prerequisite-check fails on installing infrastructure: ORCL:VOL1 is not a valid path

While installing a grid – infrastructure on my own RAC-cluster ( on VMware), using ASM with Openfiler as my own SAN, the prerequisite-check fails at step 15 (in the oraInstaller-gui) with :

PRVF-5150 : Path ORCL:VOL1 is not a valid path on all nodes

This is also the case for all the other volumes I created. But… where does this come from? Hmmm.. this turned out to be a unpublished bug, and it can be safely ignored when you are convinced you did it right, and performed some checks:

Note [ID 1210863.1]: Unpublished bug 10026970

By |January 12th, 2011|Database, RAC|0 Comments|

Unable to load module oracleasm with the ‘init’ command

While building my own RAC ( on two VM’s, using a third VM with Openfiler on it as my SAN, I had to dowload, install, configure and load oracleasm / ASMLIB. Loading didn’t  go smoothly at my own project. First I analyzed what I did, steps I took:

Step 1 : Downloading the right packages from the otn-page. It’s crucial at this point  to know exactly which packages you need, otherwise you may get some vague errors.

[root@rac1 sbin]# uname -r
[root@rac1 sbin]# uname -p
[root@rac1 sbin]# uname -i

You need these three packages:

oracleasmlib-2.0 – the Oracle ASM libraries
oracleasm-support-2.0 – utilities needed to administer ASMLib
oracleasm – a kernel module for the Oracle ASM library
By |January 6th, 2011|Database, RAC|0 Comments|

iscsiadm discovery: no output with Openfiler.

I was building my own Oracle RAC 11g cluster ( with Openfiler as my shared storage. Two VM’s as my rac-cluster, one VM with Openfiler as my own SAN (not using the applicance, used the iso-file).  Followed the instructions of the article of Jeffrey Hunter how to build a RAC on OEL and iSCSI, however this article is not based on VM. Will publish my experiences later on.

My Openfiler-VM (named it ‘Openfiler1′) was ready, given access to my both nodes on iSCSI-level, and now I want my rac1-node to discover the iSCSI-drives on my Openfiler-VM.

Command I used on node ‘rac1′, where ‘openfiler1′ is my Openfiler-VM, on a privileged network:

iscsiadm -m discovery -t st –p openfiler1-priv

By |December 31st, 2010|Database, RAC|0 Comments|

Script for setting up ssh on RAC-nodes

Finished a RAC-course a while ago with instructor Harald van Breederode. Noticed that he used a script for setting up ssh on the nodes. Short, powerful. Used it myself with user grid and oracle while installing 11g RAC.

First of all, one file should exist on forehand: $HOME:nodeinfo. Should look like this, one noder per line:


Then the file

By |December 30th, 2010|Database, RAC|0 Comments|

It started with a Misscount…

For those who are not that interested in the whole story about RAC, GFS2, the misscount-parameter and Red Hat, I’ll give you the outcome: don’t use RAC (10 or 11) with GFS2 – Red Hat Cluster Suite, it’s a dead end road. For those who are interested, you’re invited…

By |November 7th, 2010|Database, RAC|0 Comments|