fix(middlewared/disk): only run savecore in unused partitions

Ticket:	#27516

src/middlewared/middlewared/plugins/disk.py

@@ -633,9 +633,11 @@ async def swaps_configure(self):
             for p in g.providers:
                 # if swap partition
                 if p.config['rawtype'] == '516e7cb5-6ecf-11d6-8ff8-00022d09712b':
-                    # Try to save a core dump from that
-                    await run('savecore', '-z', '-m', '5', '/data/crash/', f'/dev/{p.name}', check=False)
                     if p.name not in used_partitions:
+                        # Try to save a core dump from that.
+                        # Only try savecore if the partition is not already in use
+                        # to avoid errors in the console (#27516)
+                        await run('savecore', '-z', '-m', '5', '/data/crash/', f'/dev/{p.name}', check=False)
                         swap_partitions_by_size[p.mediasize].append(p.name)
 
         dumpdev = False