"cdrecord -scanbus" causes the following errors in the log:

modprobe: modprobe: Can't locate module char-major-97

printed 4 times.

This is just an annoyance, since it seems cdrecord can do its work ok:

[root@localhost cdaudio]# cdrecord -scanbus
Cdrecord 1.8.1 (i686-pc-linux-gnu) Copyright (C) 1995-2000 Jvrg 
SchillingUsing libscg version 'schily-0.1'
scsibus0:
        0,0,0     0) 'PHILIPS ' 'PCRW804         ' ' 1.1' Removable CD-ROM
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *
scsibus1:
        1,0,0   100) *
        1,1,0   101) *
        1,2,0   102) 'TANDBERG' ' TDC 3800       ' '=07:' Removable Tape
        1,3,0   103) *
        1,4,0   104) *
        1,5,0   105) *
        1,6,0   106) *
        1,7,0   107) *
[root@localhost cdaudio]#