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Configuring non-raw multipath devices for Oracle Clusterware 11g (11.1.0, 11.2.0) on OL5/RHEL5 (Doc ID 605828.1)

Last updated on MARCH 12, 2021

Applies to:

Linux OS - Version Oracle Linux 5.0 to Oracle Linux 5.0 [Release OL5]
Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Linux x86
Linux Kernel - Version: 2.6.18-8 to 2.6.18-128
***Checked for relevance on 28-Jul-2011***
***Checked for relevance on 28-Nov-2013***
***Checked for relevance on 11-Nov-2016***


This article is intended for Oracle on Linux Database and System Administrators, specifically those intending to install (or migrate to) Oracle Real Application Clusters 11g Release 1/2 (11.1.0/11.2.0) on Oracle Linux 5 (OL5)/Red Hat Enterprise Linux 5 (RHEL5) using multipathed devices.
The article is not intended as a complete multipath reference.

Examples were taken from a working system with the following configuration, but should work for later versions:

From version 11gR1 (11.1.0), Oracle Clusterware no longer requires the use of raw devices as a means to access block devices for OCR and Voting disks - block devices may now be accessed directly. Raw devices may still optionally be used with Oracle11g Clusterware if preferred, in which case refer to <Note 465001.1> and <Note 564580.1> that describe the configuration of raw devices to singlepath and multipath Clusterware devices.


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In this Document
 Udev and Device Name Persistency
 Multipath and Udev
 Configuring non-raw multipath devices for Oracle Clusterware 11g (11.1.0/11.2.0) on OL5/RHEL5
 1. Configure SCSI_ID to Return Unique Device Identifiers
 1a. Whitelist SCSI devices
 1b. List all SCSI (Clusterware) devices
 1c. Obtain Clusterware device unique SCSI identifiers
 2. Configure Multipath for Persistent Naming of Clusterware Devices
 2a. Configure Multipathing
 2b. Verify Multipath Devices
 3. Script Multipath Device Ownership and Permissions
 4. Test Multipath Device Ownership and Permission Script
 5. Install Oracle 11gR1/2 Clusterware

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