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When I run the following command at shell prompt on Debian or Ubuntu Linux

mdadm -Ac partitions /dev/md0 -m dev

I'm getting the message/warning that read as follows:

Failed to RUN_ARRAY /dev/md0 invalid argument.

How do I fix this issue? How do I rebuild array again on Linux operating system using mdadm command?

Tutorial details
DifficultyEasy (rss)
Root privilegesYes
Estimated completion time5m

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Linux Check The Health of Adaptec RAID array

Q. How do I check the health of Adaptec RAID array under Fedora / CentOS / Red Hat Enterprise Linux / Debian / Ubuntu Linux server from a shell prompt?
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Q. What are the different RAID levels? Which one is recommended for file server and database server?
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