====== Linux Software RAID Quick Reference ======

===== title =====

<code:bash>code</code>

===== Enumerate RAIDs =====

<code:bash>mdadm -E /dev/sd[a-c][0-3]</code>

===== Check RAID activity =====

<code:bash>cat /proc/mdstats</code>

===== Detail RAID device =====

<code:bash>mdamd --detail /dev/md125</code>

grep for State

===== create mdadm.conf =====

<code:bash>mdadm --detail --scan --verbose >> /etc/mdadm.conf</code>

This also shows devices UUID
===== SELinux RAID fix =====

<code:bash>restorecon -R /mnt/raid1</code>

where ''/mnt/raid1'' is the mount path of the RAID


===== References =====

Build:
https://www.tecmint.com/create-raid1-in-linux/

Repair:
https://www.tecmint.com/recover-data-and-rebuild-failed-software-raid/

Reenable a disabled array:
http://fibrevillage.com/storage/676-how-to-fix-linux-mdadm-inactive-array

Rescue mbr/UEFI:
https://www.thegeekdiary.com/centos-rhel-7-how-to-reinstall-grub2-from-rescue-mode/