[CentOS] Question on SATA DVD using centos 5.1

On my machine I have

SATA0: HD
SATA1: HD these two drives are set as RAID1
SATA2: HD extra
SATA3: DVD
SATA4: external USB disk

Snip from dmesg shows the ATAPI device being detected.

ata3: SATA max UDMA/133 cmd 0x9e0 ctl 0xbe0 bmdma 0xe400 irq 10
ata4: SATA max UDMA/133 cmd 0x960 ctl 0xb60 bmdma 0xe408 irq 10
ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata3.00: ATAPI: PIONEER BD-ROM  BDC-202, 1.01, max UDMA/66
ata3.00: configured for UDMA/66
ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata4.00: ATA-7: ST3500630AS, 3.AAC, max UDMA/133
ata4.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 0/32)
ata4.00: configured for UDMA/133

sda is HD
sdb is HD again RAID1
sdc is the HD extra
sdd should be hte ATAPI DVD but it ends up being the external USB

nothing is at sde

Where might my DVD be?

Jerry