You didn't actually show any of the steps. My first suggestion is to use
your favorite web search service to inquire how to remove an mdadm RAID1
array with a query like: "remove mdadm array".
On Thu, Feb 10, 2022, 11:16 Rich Shepard <rshep...@appl-ecosys.com> wrote:
> I tried following steps to remove a RAID array. While /dev/md0 was removed
> the two disks comprising the array still show them attached to it:
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> sdf 8:80 0 1.8T 0 disk
> └─md0 9:0 0 1.8T 0 raid1
> sdd 8:48 0 1.8T 0 disk /mnt/data3
> sdb 8:16 0 1.8T 0 disk
> ├─sdb2 8:18 0 100G 0 part /opt
> ├─sdb3 8:19 0 1.3T 0 part /data1
> └─sdb1 8:17 0 400G 0 part /home
> sr0 11:0 1 1024M 0 rom
> sde 8:64 0 1.8T 0 disk
> └─md0 9:0 0 1.8T 0 raid1
> sdc 8:32 0 1.8T 0 disk /mnt/data2
> sda 8:0 0 232.9G 0 disk
> ├─sda2 8:2 0 32G 0 part [SWAP]
> ├─sda3 8:3 0 200.8G 0 part /
> └─sda1 8:1 0 100M 0 part /boot/efi
>
> Using cfdisk I deleted the partitions on /dev/sd{e,f} but cannot start
> recreating the RAID1 because mdadm tells me it's busy.
>
> A clue is needed so I can rebuild the RAID1 and rebuild my backup bank.
>
> TIA,
>
> Rich
>
