I have an old WD NAS that I'm trying to resurrect.
It's actually mostly working and I can see the web configuration GUI and login to it with ssh. However its RAID setup has got broken somehow.
It was configured to use its two 1Tb disk drives in SBOD mode to give what is supposed to look like one 2Tb disk. However something has gone wrong and it would appear that only one of the two disk drives is configured on the RAID array.
It's not possible to unRAID it (I hate RAID) so one can't just configure it to have two disks. The web configuration GUI just shows that both drives are OK/good but that the second drive isn't joining the RAID configuration properly.
So how is software RAID usually configured and started up? I can't find anything that looks as if it's "start up the RAID software" in any of the init files in /etc. So how's it done?
The 'symptom' I see is that /dev/md4 isn't created and mounted, all the rest are OK (i.e. /dev/md0, /dev/md1, /dev/md2 and /dev/md3).