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bdacheckcluster/bdachecksw Reports "WARNING: Wrong number of internal M2 devices" on X7-2/X8-2 After Replacing a Failed SSD (Doc ID 2728724.1)

Last updated on JANUARY 14, 2021

Applies to:

Big Data Appliance Integrated Software - Version 4.14.0 and later
Linux x86-64

Symptoms

bdacheckcluster/bdachecksw reports "WARNING: Wrong number of internal M2 devices" on X7-2/X8-2 servers after replacing a failed SSD or replacing both SSDs.

WARNING: Wrong number of internal M2 devices (0) : 0
INFO: Expected number of internal M2 devices (0) : 2

Two SSD disks ship with X7-2/X8-2 servers on the BDA. A user data RAID partition (/ssddisk) is created which spans both SSDs. This configuration allows user data to be retained even if an SSD goes bad and is replaced. Hence this is what is used for Zookeeper and Journal Node metadata.

 

Cause

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In this Document
Symptoms
Cause
Solution
 Option 1. For when one SSD fails.
 Option 2. For when both SSDs fail.
References


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