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mdadm: Cannot open /dev/sda1: Device or resource busy (Doc ID 1483141.1)

Last updated on MAY 01, 2021

Applies to:

Linux OS - Version Oracle Linux 4.4 and later
Oracle Cloud Infrastructure - Version N/A and later
Linux x86
Linux x86-64


 When trying to re-add a device to a raid, you get the following message:

[root@<host>]# mdadm /dev/md2 --add /dev/sda1
mdadm: Cannot open /dev/sda1: Device or resource busy




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