K 10 svn:author V 5 joerg K 8 svn:date V 27 1997-12-20T23:03:49.000000Z K 7 svn:log V 265 Protect against a null pointer dereferencation in the case of an unknown drive. Such a drive will be configured by worm(4) nevertheless (albeit with a warning), but cannot be opened except of the SCSI control device (so scsi(8) or cdrecord will continue to work). END