I have to wipe the OS and start all over with my NAS setup.

If you are setting up on Debian 10, avoid this guide.

There are too many errors and differences in commands.

I am using Debian 10 (buster) and i also show “/etc/mdadm/mdadm.conf” but even when i correct the command to run:

$ sudo mdadm --detail --scan --verbose >> sudo /etc/mdadm/mdadm.conf

I get the following error:

mdadm: /etc/mdadm/mdadm.conf does not appear to be an md device

This guide has been very helpful and I’m so close to the finish line I just need help on this last step.

Can anyone guide me in the right direction?

Please correct your TYPOS!!!!!

in the comments and also on this site they needed to correct YOUR tutorial typos!!!!

CORRECT IT PLEASE as it is on the top search engines so noobs like me DONT HAVE TO INVESTIGATE FURTHER!!!!

You have multiple errors.

1. Change this error:

# mdadm -E /dev/sd[b-c]

to this correction:

# mdadm -E /dev/sd[b-d]

2. Change these argument syntax errors:

-l=5 -n=3  to -l 5 -n 3

‘mdadm -C /dev/md0 -l=5 -n=3 /dev/sd[b-d]1’ <== wrong
'mdadm -C /dev/md0 -l 5 -n 3 /dev/sd[b-d]1' <== right!!! = is only for long version