A quick how to today.
/dev/md127. It happened again while I was adding a new RAID array to
replace another one. You have no idea the number of times I had to look on the
Internet on how to fix this problem. It usually take 1/2 hour to get the
correct instructions, and I always tell to myself:
The solution to this problem is very simple. I know I will remember how to deal with it the next time.
But this is not the case, hence the reason for writing this post.
The fix is quite simple:
Get the list of all raid arrays
# mdadm --detail --scan
Copy the array of interest from previous output. Remove the
namevariable and append what remains in
/etc/mdadm.conf. If you have for example
ARRAY /dev/md127 metadata=1.2 name=<hostname>:127 UUID=<some_uuid>
ARRAY /dev/md10 metadata=1.2 UUID=<some_uuid>
/dev/md10which is our desired device kernel name.
Update the initramfs. In my case, on Parabola GNU/Linux-libre
# mkinitcpio -p linux-libre # mkinitcpio -p linux-libre-lts
Reboot and check if the RAID device name is now correct.
All this applies if you use mdadm and a GNU/Linux system.