I have disk that was part of raid 1. I created (probably mistakenly) new raid with that disk to recover the data:
mdadm --create /dev/md0 --auto md --level=1 --force --raid-devices=1 /dev/sdc1
now mount says:
~$ mount -t auto /dev/md0 /mnt/test/ NTFS signature is missing. Failed to mount '/dev/md0': Invalid argument The device '/dev/md0' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
It looks like "mdadm --create" has removed the information that sdc1 is/was ext4 file system.
Is the ext4 destroyed now? Can I somehow rescue it?