What option turns this off?

Under NB 6.0MP2.

-rw-rw-r--    1 root     root           72 Jun 13 04:00 
51216-127-2198478612-060613-0000000000.log
-rw-rw-r--    1 root     root           72 Jun 13 03:55 
51216-127-8323328-060613-0000000000.log
-rw-rw-r--    1 root     root       185359 Jun 14 03:25 
51216-132-2198478612-060613-0000000000.log
-rw-rw-r--    1 root     root        41745 Jun 14 04:09 
51216-132-2198478612-060614-0000000000.log
-rw-rw-r--    1 root     root       778072 Jun 14 03:20 
51216-153-2198478612-060613-0000000000.log
-rw-rw-r--    1 root     root        65627 Jun 14 03:48 
51216-153-2198478612-060614-0000000000.log
-rw-rw-r--    1 root     root       524170 Jun 13 16:53 
51216-157-2198478612-060613-0000000000.log
-rw-rw-r--    1 root     root       158390 Jun 14 04:09 
51216-157-2198478612-060614-0000000000.log
-rw-rw-r--    1 root     root        50694 Jun 13 12:12 
51216-163-2198478612-060613-0000000000.log
-rw-rw-r--    1 root     root        23274 Jun 14 04:09 
51216-163-2198478612-060614-0000000000.log
drwxr-xr-x    2 root     root         4096 Jun 14 00:00 vnetd
drwxr-xr-x    2 root     root         4096 May 16  2005 vopied
$ pwd
/cat-backup/openv/logs
$