[CentOS] Issue with dvd/cdrom drive

Hi,
I'm having an issue with my Thinkpad P70 laptop/workstation. This system is
a dual boot,
windows 10 pro and centos 7. I have not needed to use the cdrom until now,
however the system does not see it in /dev. I know the cdrom works as I can
use it in windows 10 and when initially installing centos 7, I installed
from dvd media. I'm not sure what to check.
I do not see anything related in dmesg. I have previous copies of kernel on
the system and tried booting with 3.10.0-957.el7.x86_64 but I'm seeing the
same.

----------
# uname -r
3.10.0-957.21.3.el7.x86_64

# lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen
Core Processor Host Bridge/DRAM Registers (rev 07)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen
Core Processor PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics P530 (rev
06)
00:14.0 USB controller: Intel Corporation 100 Series/C230 Series Chipset
Family USB 3.0 xHCI Controller (rev 31)
00:14.2 Signal processing controller: Intel Corporation 100 Series/C230
Series Chipset Family Thermal Subsystem (rev 31)
00:16.0 Communication controller: Intel Corporation 100 Series/C230 Series
Chipset Family MEI Controller #1 (rev 31)
00:16.3 Serial controller: Intel Corporation 100 Series/C230 Series Chipset
Family KT Redirection (rev 31)
00:17.0 RAID bus controller: Intel Corporation SATA Controller [RAID mode]
(rev 31)
00:1c.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family
PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family
PCI Express Root Port #3 (rev f1)
00:1c.4 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family
PCI Express Root Port #5 (rev f1)
00:1d.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family
PCI Express Root Port #13 (rev f1)
00:1f.0 ISA bridge: Intel Corporation CM236 Chipset LPC/eSPI Controller
(rev 31)
00:1f.2 Memory controller: Intel Corporation 100 Series/C230 Series Chipset
Family Power Management Controller (rev 31)
00:1f.3 Audio device: Intel Corporation 100 Series/C230 Series Chipset
Family HD Audio Controller (rev 31)
00:1f.4 SMBus: Intel Corporation 100 Series/C230 Series Chipset Family
SMBus (rev 31)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2)
I219-LM (rev 31)
01:00.0 VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro
M600M] (rev a2)
04:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
05:00.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine
Ridge 4C 2015]
06:00.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine
Ridge 4C 2015]
06:01.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine
Ridge 4C 2015]
06:02.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine
Ridge 4C 2015]
06:04.0 PCI bridge: Intel Corporation DSL6540 Thunderbolt 3 Bridge [Alpine
Ridge 4C 2015]
07:00.0 System peripheral: Intel Corporation DSL6540 Thunderbolt 3 NHI
[Alpine Ridge 4C 2015] (rev ff)
3b:00.0 USB controller: Intel Corporation DSL6540 USB 3.1 Controller
[Alpine Ridge]
70:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A
PCI Express Card Reader (rev 01)

# hwinfo --block --short
disk:
  /dev/sda             Samsung Portable SSD T5
  /dev/sdb             Samsung Portable SSD T5
                       Samsung Electronics Portable SSD T5
                       Samsung Electronics Portable SSD T5
partition:
  /dev/sda1            Partition
  /dev/sda2            Partition
  /dev/sda3            Partition
  /dev/sda4            Partition
  /dev/sdb1            Partition
  /dev/sdb2            Partition
  /dev/sdb3            Partition

Any suggestions?
thanks
~d