Disk full on db2 server

[gregor weertman]

Hello,

I'm administrating a server where db2 is installed.
1 disk is full with files like this:
53.670.780.928 c0a81c165471025b156d4350014.fd
53.670.518.784 c0a81c165471037ea56d4350017.fd
49.547.321.344 c0a81c16547104c2556d435001a.fd
247.472.128 c0a81c1654710602556d435001d.fd
991.232 c0a81c1654710603b56d4350020.fd
19.931.136 c0a81c1654710604056d435002c.fd
53.670.256.640 c0a81c1654719666a50e7d50012.fd
53.670.715.392 c0a81c1654719786c50e7d50015.fd
53.670.912.000 c0a81c16547198cce50e7d50018.fd
53.670.846.464 c0a81c1654719a26a50e7d5001b.fd
53.670.649.856 c0a81c1654719b79350e7d5001e.fd
3.694.075.904 c0a81c1654719ce2d50e7d50021.fd
17.768.448 c0a81c1654719cf8150e7d50024.fd
19.996.672 c0a81c1654719cf8b50e7d50036.fd

wat are these files?
can I remove them?