Hendrik Boom - 11.08.19, 14:44:53 CEST:
> That may be true. You can also check with “wipefs” tool (don't worry,
> > without -a it won't wipe anything):
> >
> > wipefs --no-act /dev/sda4
> >
> > Wipefs has a big database of various filesystem metadata, it detects
> > almost anything.
>
> april:/farhome/hendrik# wipefs --no-act /dev/sda4
> april:/farhome/hendrik#
>
> Looks empty.
>
> Thanks. Now I wonder why I ever created that partition.

To complete that, what does

file -sk /dev/sda4

show?

--
Martin