If I run
mdadm -Ebsc partitions
I get the following output
ARRAY /dev/md0 level=raid5 num-devices=3 UUID=WW:XX:YY:ZZ spares=1
ARRAY /dev/md0 level=raid5 num-devices=5 UUID=WW:XX:YY:ZZ
ARRAY /dev/md1 level=raid5 num-devices=5 UUID=WW:XX:YY:ZZ
(All entries have different UUIDs)
The /etc/mdadm/mdadm.conf file only contains the last two entries, so I assume that the first is my old config that was not properly deleted when I revamped my system earlier this year.
I want to remove the first entry. Is there anyway to do this? If I use the examples I have seen, they only specify the device with /dev/md0, not the UUID.
How can I find out WHERE the entry (superblock) exists, and how to zero out just that one?
At one point today, when I rebooted, the system used that first entry and automatically started to rebuild the OLD array. I stopped the array as fast as I could, and it appears that things are OK. But I am scared to reboot into an automatic state!