$ dmesg | grep cd0
acd0: CD-RW <HL-DT-ST GCE-8523B> at ata1-slave PIO4
acd0: CD-RW <HL-DT-ST GCE-8523B> at ata1-slave PIO4
cd0 at ata1 bus 0 target 1 lun 0
cd0: <HL-DT-ST CD-RW GCE-8523B 1.01> Removable CD-ROM SCSI-0 device
cd0: 16.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed

$ sudo camcontrol devlist
<QUANTUM DLT7000 1E48>             at scbus0 target 8 lun 0 (pass0,sa0)
<ADAPTEC RAID-5 3A0L>              at scbus1 target 0 lun 0 (pass1,da0)
<HL-DT-ST CD-RW GCE-8523B 1.01>    at scbus6 target 1 lun 0 (pass2,cd0)

$ sudo cdrecord -scanbus
Cdrecord-Clone 2.01 (i386-unknown-freebsd4.10) Copyright (C) 1995-2004 Jörg Schilling
Using libscg version 'schily-0.8'.
scsibus0:
        0,0,0     0) *
        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) *
        0,8,0     8) 'QUANTUM ' 'DLT7000         ' '1E48' Removable Tape
scsibus1:
        1,0,0   100) 'ADAPTEC ' 'RAID-5          ' '3A0L' Disk
        1,1,0   101) *
        1,2,0   102) *
        1,3,0   103) *
        1,4,0   104) *
        1,5,0   105) *
        1,6,0   106) *
        1,7,0   107) *
scsibus6:
        6,0,0   600) *
        6,1,0   601) 'HL-DT-ST' 'CD-RW GCE-8523B ' '1.01' Removable CD-ROM
        6,2,0   602) *
        6,3,0   603) *
        6,4,0   604) *
        6,5,0   605) *
        6,6,0   606) *
        6,7,0   607) *