@dyacishyn Looks like I was wrong. The partition on the new disk does not have a filesystem on it as we see by the output of the file command. Do you remember if you missed the mkfs.ext4 /dev/sdb1 command?? I suggest you issue that command (again).
I won’t be liable for any loss of data. Formating a disk with a new filesystem will overwite whatever is on there now.
mv /images/.mntcheck /root mkfs.ext4 /dev/sdb1 mount /dev/sdb1 /images mv /root/.mntcheck /imagesIf this is all fine (no errors) you might just do another server reboot to make sure it’s all fine.