Boot CD-ROM error messages

[Mark Ovens]

Anyone know why I get the messages below when I boot with an audio CD in 
a drive? It looks a though FreeBSD assumes that it is a data disk and 
tries to read it as such.

Running

FreeBSD redshift 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #19: Wed Mar 10 
01:50:42 GMT 2004     mark at redshift:/usr/obj/usr/src/sys/REDSHIFT  i386

TIA

Regards,

Mark

--------- begin dmesg fragment -----------------
cd2 at ahc0 bus 0 target 5 lun 0
cd2: <PIONEER DVD-ROM DVD-305 1.05> Removable CD-ROM SCSI-2 device
cd2: 5.000MB/s transfers (5.000MHz, offset 16)
cd2: cd present [229700 x 2048 byte records]

(cd2:ahc0:0:5:0): READ(10). CDB: 28 0 0 0 0 0 0 0 1 0
(cd2:ahc0:0:5:0): CAM Status: SCSI Status Error
(cd2:ahc0:0:5:0): SCSI Status: Check Condition
(cd2:ahc0:0:5:0): ILLEGAL REQUEST asc:64,0
(cd2:ahc0:0:5:0): Illegal mode for this track
(cd2:ahc0:0:5:0): Unretryable error
(cd2:ahc0:0:5:0): cddone: got error 0x6 back
(cd2:ahc0:0:5:0): READ(10). CDB: 28 0 0 0 0 1 0 0 1 0
(cd2:ahc0:0:5:0): CAM Status: SCSI Status Error
(cd2:ahc0:0:5:0): SCSI Status: Check Condition
(cd2:ahc0:0:5:0): ILLEGAL REQUEST asc:64,0
(cd2:ahc0:0:5:0): Illegal mode for this track
(cd2:ahc0:0:5:0): Unretryable error
(cd2:ahc0:0:5:0): cddone: got error 0x6 back
(cd2:ahc0:0:5:0): READ(10). CDB: 28 0 0 0 0 0 0 0 1 0
(cd2:ahc0:0:5:0): CAM Status: SCSI Status Error
(cd2:ahc0:0:5:0): SCSI Status: Check Condition
(cd2:ahc0:0:5:0): ILLEGAL REQUEST asc:64,0
(cd2:ahc0:0:5:0): Illegal mode for this track
(cd2:ahc0:0:5:0): Unretryable error
(cd2:ahc0:0:5:0): cddone: got error 0x6 back
--------- end dmesg fragment -----------------