Martin Gregorie wrote:

I don't 'do' RAID (never needed to outside RAID 1 on Tandem NonStop and
Stratus fault tolerant systems, but apart from suggesting gparted or fsck
repairs (WHICH THE OP CAN EASILY IGNORE), everything else I suggested is,
or should be, read-only. How could read-only checks mess up RAID metadata?

read-only wouldn't, but an inexperienced user could accidentally write
something, and if the disks are from a RAID system, the partitions
probably don't start where partition tools are going to be looking for
them, so you'll get a false sense that there aren't valid partitions on
the disks.