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Diskdump Utility: Dumping memory to local disk (Doc ID 549398.1)

Last updated on JUNE 24, 2020

Applies to:

Linux OS - Version Enterprise Linux 3.0 to Oracle Linux 4.8 [Release RHEL3 to OL4U8]
Oracle Cloud Infrastructure - Version N/A and later
Linux x86
Linux x86-64

Goal

This document describes how to generate a kernel crash dump to local disk using the diskdump utility.

Configuring diskdump is not mandatory for most users, but generating a kernel crash dump is really useful to analyze and solve kernel issues. So you should consider to configure this feature if you have certain kernel issues.

It is possible to generate and transmit a crash dump across the network by netdump also, however it needs significant time to save and transmit the image. Netdump utilizes UDP to transfer images - therefore considered faster, diskdump tends to be more reliable and quicker method for providing kernel crash dumps.

Solution

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In this Document
Goal
Solution
 1. Requirements
 2. Configuration
 3. Testing Diskdump
References

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