I have two questions:
It's not clear which flag to use when generating mdadm.conf.
I've seen people and documentation usemdadm -E --scan
I've also seen
mdadm -D --scan
.
Which is correct to use?
I'm on Ubuntu 18.04.3 LTSThey usually report similar information just in a different way but during rebuild of spare on my system I noticed they are different (RAID 5)
root@xxxxx:~# mdadm -D --scan ARRAY /dev/md/imsm0 metadata=imsm UUID=29c041a7:85b67ead:18fe5dc4:4acac02a ARRAY /dev/md/Volume0 container=/dev/md/imsm0 member=0 spares=1 UUID=3fefef37:bf7ec5be:8aa0bf1f:695109bb root@xxxxx:~# mdadm -E --scan ARRAY metadata=imsm UUID=29c041a7:85b67ead:18fe5dc4:4acac02a ARRAY /dev/md/Volume0 container=29c041a7:85b67ead:18fe5dc4:4acac02a member=0 UUID=3fefef37:bf7ec5be:8aa0bf1f:695109bb