We have been working on a project for a customer to upgrade the kernel, PowerPath, OCFS2 and other operating system patches.  The project was interesting as no single source of information existed on the appropriate process.

The procedure issue comes in because OCFS2 relies on seeing the disks which PowerPath presents.  PowerPath and OCFS2 are reliant on a particular kernel version to work properly.  With all of the inter-dependencies,  which should be done and in what order was the question. To top it off, this was also running a RHEL cluster and another instance running Oracle RAC.

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