Oracle Linux: Raw Devices on Linux
(Doc ID 224302.1)
Last updated on OCTOBER 16, 2022
Applies to:
Linux OS - Version Oracle Linux 4.4 to Oracle Linux 8.0 [Release OL4U4 to OL8]Oracle Cloud Infrastructure - Version N/A and later
Linux x86
Linux x86-64
Purpose
This FAQ document identifies the most frequently reported how-to questions. The articles below do not include bugs/patches or troubleshooting.
Questions and Answers
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In this Document
| Purpose |
| Questions and Answers |
| How can a raw device be recognised? |
| What are the benefits of raw devices? |
| Are there circumstances when raw devices have to be used? |
| Can I use the entire raw partition for Oracle? |
| How many raw devices I have in Linux by default and how many raw can I have? |
| How can I create new raw devices? |
| Who should own the raw device? |
| How can I use a raw device for Oracle RDBMS? |
| Does the Oracle block size have any relevance on a raw device? |
| How can I back up my database files if they are on raw devices? |
| Providing I am not using Parallel Server or Real Application Cluster, can I use a mixture of raw? |
| Should I store my redo log files on raw partitions? |
| Can I use raw partitions for archive logs? |
| Can I have more than one data file on a raw partition? |
| Should my raw partitions be on the same disk device? |
| Do I need to make my raw partitions all the same size? |
| Do I need to change any UNIX kernel parameters if I decide to use raw devices? |
| What other UNIX-level changes could help to improve I/O performance? |
| How can I gain further performance benefits, after considering all of the above? |
| Does raw storage support with Oracle Database/Clusterware 12c? |