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Oracle® Real Application Clusters Installation and Configuration Guide
10g Release 1 ( for Linux x86-64
Part No. B14406-01
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C Configuring Raw Devices for Real Application Clusters

This appendix provides additional information about configuring raw devices to deploy Real Application Clusters (RAC). You must configure raw devices if you do not use ASM or a cluster file system. The topic in this appendix is:

Raw Devices Required by the DBCA for Non-CFS Environments

If you want to use the DBCA to create a database on raw storage, then configure the raw devices described in this section. These devices are in addition to the OCR and voting disk required to install Cluster Ready Services (CRS). Create these devices before running the OUI to install the Oracle Database 10g software. The DBCA cannot create a RAC database unless you have properly configured the following devices:

Planning Your Raw Device Creation Strategy

Before installing the Oracle Database 10g software with RAC, create enough partitions of specific sizes to support your database and also leave a few spare partitions of the same size for future expansion. For example, if you have space on your shared disk array, select a limited set of standard partition sizes for your entire database. Partition sizes of 50MB, 100MB, 500MB, and 1GB are suitable for most databases. Also create a few very small and a few very large spare partitions that are, for example, 1MB and perhaps 5GB or greater in size. Based on your plans for using each partition, determine the placement of these spare partitions by combining different sizes on one disk, or by segmenting each disk into same-sized partitions.


Ensuring that there are spare partitions enables you to perform emergency file relocations or additions if a tablespace datafile becomes full.