I'm trying to create 4 RAID 0 disk arrays on my system running Centos 7.5 and have the RAIDs automount after a reboot. For some reason, only one of the RAIDs /dev/md0 is persistent between boots. The remaining three RAIDs (md1,md2,md3) all disappear after a reboot.
I build the RAIDs using:
$ sudo mdadm --create --chunk 4096 --verbose /dev/md0 --level=stripe \ --raid-devices=2 /dev/nvme0n1 /dev/nvme1n1 $ sudo mdadm --create --chunk 4096 --verbose /dev/md1 --level=stripe \ --raid-devices=2 /dev/nvme2n1 /dev/nvme3n1 $ sudo mdadm --create --chunk 4096 --verbose /dev/md2 --level=stripe \ --raid-devices=2 /dev/nvme4n1 /dev/nvme5n1 $ sudo mdadm --create --chunk 4096 --verbose /dev/md3 --level=stripe \ --raid-devices=2 /dev/nvme6n1 /dev/nvme7n1
Then I update the
/etc/mdadm.conf file using:
$ mdadm --detail --scan >> /etc/mdadm.conf
Finally after mounting the drives to their appropriate directory and adding them to
/etc/fstab I rebuilt the initramfs image using
$ sudo dracut --force --mdadmconf
dracut, I reboot the system and
/dev/md0 is there but the other RAIDs are not, so I did some investigating and it seems like
/etc/mdadm.conf is not being included in the initramfs, so I repeated all of the previous steps, except for the
dracut command I manually added what seemed to be missing using:
$ sudo dracut --force --include /etc/mdadm.conf /etc/mdadm.conf \ --add="mdraid" --mdadmconf`
After running the command, I see that
/usr/sbin/mdadm are included in the initramfs using:
$ sudo lsinitrd /boot/initramfs-$(uname -r).img
What am I missing?
Edit 1 I've added mdadm --assemble --scan to /etc/rc.local and tried running it from the command line once the system has booted, but md1, md2, and md3 still are not found. As before, md0 is found at boot.
I have a separate OS disk, so I am not booting from md0