lsblk 與 lshw 等級磁碟，DVD 無法辨識

Question

我插入空白的新 DVD-R

lshw -class disk
WARNING: you should run this program as super-user.
  *-cdrom                 
       description: DVD-RAM writer
       product: CDDVDW SH-222AB
       vendor: TSSTcorp
       physical id: 0.0.0
       bus info: scsi@2:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/sr0
       version: SB00
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=ready
     *-medium
          physical id: 0
          logical name: /dev/cdrom

另一方面

lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sdb      8:16   0 931,5G  0 disk 
sda      8:0    0 111,8G  0 disk 
├─sda2   8:2    0 103,4G  0 part /
├─sda3   8:3    0     8G  0 part [SWAP]
└─sda1   8:1    0   512M  0 part /boot/efi

我不明白為什麼我的 DVD 無法辨識lsblk？另外為什麼物理id是0，在這種情況下0是什麼意思？