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Configuring raw devices (multipath) for Oracle Clusterware 10g Release 2 (10.2.0) on RHEL5/OL5 (Doc ID 564580.1)

Last updated on FEBRUARY 03, 2019

Applies to:

Linux OS - Version Oracle Linux 5.0 to Oracle Linux 5.9 with Unbreakable Enterprise Kernel [2.6.39] [Release OL5 to OL5U9]
Linux x86
Linux x86-64
***Checked for relevance on 28-Jan-2013***
***Checked for relevance on 30-Jun-2014***
***Checked for currency on 09 May 2017***


Goal

This article is intended for Oracle on Linux Database and System Administrators, particularly those intending to install (or migrate to) Oracle Real Application Clusters 10g Release 2 (10.2.0) on Red Hat/Oracle Linux 5 (OL5). The article is intended to focus on the configuration of raw devices against multipathed devices on OL5 in preparation for RAC Clusterware usage, rather than on multipathing or installation of the Clusterware.

Examples were taken from a working system of the following configuration:

Note: this document differs to <Note.465001.1> that describes configuration of raw devices against single pathed devices. This Note describes configuration of raw devices against multipathed devices.

Solution

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In this Document
Goal
Solution
 Deprecation of Support for Raw Devices
 A Bit About Udev and Device Name Persistency
 Multipath, Raw and Udev
 Configuring raw devices (multipath) for Oracle Clusterware 10g Release 2 (10.2.0) on RHEL5/OL5
 Assumptions
 1. Configure SCSI_ID to Return Unique Device Identifiers
 1a. Whitelist SCSI 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. Create Raw Devices
 4. Test Raw Device Accessibility
 5. Script Creation of Raw Bindings and Permissions
 6. Test the Raw Device Script
References

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