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HOWTO: Which Disks Are Handled by ASMLib Kernel Driver? (Doc ID 313387.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version 1.0.1-1 to 1.0.5-1 [Release RHEL3]
Linux OS - Version 2.0.0-1 to 2.0.5-1 [Release RHEL4 to OL5]
Oracle Database - Enterprise Edition - Version to [Release 10.1 to 10.2]
Linux x86
Red Hat Advanced Server
IBM: Linux on POWER Big Endian Systems
Linux x86-64
Linux Itanium
**Checked for relevance on 27-Dec-2010***
Linux Kernel - Version: 1.0.1-1 to 1.0.5-1
Linux Kernel - Version: 2.0.0-1 to 2.0.5-1
***Checked for relevance on 21-Nov-2012***


ASMLib Kernel Driver is an Open Source kernel module for Linux developed by Oracle to provide Oracle Automatic Storage Manager (ASM) access to Linux block devices for physical disks instead of using raw devices. For details see the related Oracle Technology Network page (

In the course of system configuration as a system or database administrator, you might want to find out which specific physical disks are being handled by ASMLib. This document provides you some methods to find out this information.


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In this Document
 Method 1: Manually Using Device Major and Minor Numbers
 Method 2: Brute Force with ASMLib Command "querydisk"
 Method 3: Query via the Block Device Attributes

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