I have a bluering with 2x500gb that I've replaced with 2x2tb following "Upgrade Blue-Ring 500GB Dual Disk- The SAFE Way" - Everything is jolly and good untill I get to point 18.
18. After rebooting we need to enable the RAID1 abilities. Type: mdadm —stop /dev/md4 (to stop the array)
Where I get this error:
[root@TheMercySeat /]# mdadm —stop /dev/md4
mdadm: fail to stop array /dev/md4: Device or resource busy
I've tried rebooting, doing the hole thing over again, but I can't get it to work… and my linux skills are limited, so I was hoping there might be someone out there that have an idea how to solve this?