danny@danny-desktop:~$ dmesg | grep cd
[    0.417752] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.417773] ehci_hcd 0000:00:1a.7: PCI INT C -> GSI 18 (level, low) -> IRQ 18
[    0.417787] ehci_hcd 0000:00:1a.7: setting latency timer to 64
[    0.417789] ehci_hcd 0000:00:1a.7: EHCI Host Controller
[    0.417818] ehci_hcd 0000:00:1a.7: new USB bus registered, assigned bus number 1
[    0.419541] ehci_hcd 0000:00:1a.7: cache line size of 32 is not supported
[    0.419541] ehci_hcd 0000:00:1a.7: irq 18, io mem 0xfdfff000
[    0.451266] ehci_hcd 0000:00:1a.7: USB 2.0 started, EHCI 1.00
[    0.451479] ehci_hcd 0000:00:1d.7: PCI INT A -> GSI 23 (level, low) -> IRQ 23
[    0.451499] ehci_hcd 0000:00:1d.7: setting latency timer to 64
[    0.451502] ehci_hcd 0000:00:1d.7: EHCI Host Controller
[    0.451537] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 2
[    0.455435] ehci_hcd 0000:00:1d.7: cache line size of 32 is not supported
[    0.455450] ehci_hcd 0000:00:1d.7: irq 23, io mem 0xfdffe000
[    0.471266] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00
[    0.471452] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.471467] uhci_hcd: USB Universal Host Controller Interface driver
[    0.471510] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    0.471519] uhci_hcd 0000:00:1a.0: setting latency timer to 64
[    0.471522] uhci_hcd 0000:00:1a.0: UHCI Host Controller
[    0.471554] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 3
[    0.471589] uhci_hcd 0000:00:1a.0: irq 16, io base 0x0000ff00
[    0.471737] uhci_hcd 0000:00:1a.1: PCI INT B -> GSI 21 (level, low) -> IRQ 21
[    0.471743] uhci_hcd 0000:00:1a.1: setting latency timer to 64
[    0.471745] uhci_hcd 0000:00:1a.1: UHCI Host Controller
[    0.471776] uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 4
[    0.471802] uhci_hcd 0000:00:1a.1: irq 21, io base 0x0000fe00
[    0.471946] uhci_hcd 0000:00:1a.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18
[    0.471952] uhci_hcd 0000:00:1a.2: setting latency timer to 64
[    0.471954] uhci_hcd 0000:00:1a.2: UHCI Host Controller
[    0.471991] uhci_hcd 0000:00:1a.2: new USB bus registered, assigned bus number 5
[    0.472012] uhci_hcd 0000:00:1a.2: irq 18, io base 0x0000fd00
[    0.472150] uhci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23
[    0.472155] uhci_hcd 0000:00:1d.0: setting latency timer to 64
[    0.472158] uhci_hcd 0000:00:1d.0: UHCI Host Controller
[    0.472183] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 6
[    0.472204] uhci_hcd 0000:00:1d.0: irq 23, io base 0x0000fc00
[    0.472344] uhci_hcd 0000:00:1d.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19
[    0.472349] uhci_hcd 0000:00:1d.1: setting latency timer to 64
[    0.472352] uhci_hcd 0000:00:1d.1: UHCI Host Controller
[    0.472377] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 7
[    0.472403] uhci_hcd 0000:00:1d.1: irq 19, io base 0x0000fb00
[    0.472539] uhci_hcd 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18
[    0.472544] uhci_hcd 0000:00:1d.2: setting latency timer to 64
[    0.472547] uhci_hcd 0000:00:1d.2: UHCI Host Controller
[    0.472577] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 8
[    0.472597] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000fa00
[    0.770016] usb 1-3: new high speed USB device using ehci_hcd and address 2
[    1.330016] usb 5-1: new low speed USB device using uhci_hcd and address 2
[    1.850015] usb 5-2: new low speed USB device using uhci_hcd and address 3
danny@danny-desktop:~$ sudo eject
[sudo] password for danny:
eject: unable to find or open device for: `cdrom'
danny@danny-desktop:~$ sudo lshw -C disk
  *-disk:0
       description: ATA Disk
       product: MAXTOR STM350063
       vendor: Maxtor
       physical id: 0
       bus info: scsi@2:0.0.0
       logical name: /dev/sda
       version: 3.AA
       serial: 6QG3TFGZ
       size: 465GiB (500GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=000d8273
  *-disk:1
       description: ATA Disk
       product: ST3320620AS
       vendor: Seagate
       physical id: 1
       bus info: scsi@3:0.0.0
       logical name: /dev/sdb
       version: 3.AA
       serial: 5QF29FXG
       size: 298GiB (320GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=00000001
  *-disk:2
       description: ATA Disk
       product: ST3640323AS
       vendor: Seagate
       physical id: 2
       bus info: scsi@4:0.0.0
       logical name: /dev/sdc
       version: SD35
       serial: 5VK05EYM
       size: 596GiB (640GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=d6b5bf83
  *-disk:3
       description: ATA Disk
       product: WDC WD10EADS-00L
       vendor: Western Digital
       physical id: 3
       bus info: scsi@5:0.0.0
       logical name: /dev/sdd
       version: 01.0
       serial: WD-WCAU49177149
       size: 931GiB (1TB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=9c09cb02
  *-disk:4
       description: ATA Disk
       product: ST3320620AS
       vendor: Seagate
       physical id: 0.0.0
       bus info: scsi@6:0.0.0
       logical name: /dev/sde
       version: 3.AA
       serial: 6QF0WM3V
       size: 298GiB (320GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=06ffe2fa
  *-disk
       description: SCSI Disk
       physical id: 0.0.0
       bus info: scsi@10:0.0.0
       logical name: /dev/sdf
       size: 3822MiB (4007MB)
       capabilities: partitioned partitioned:dos
       configuration: signature=0003c786
danny@danny-desktop:~$ /dev/cdrom --> /dev/hdc
bash: /dev/hdc: Permission denied
danny@danny-desktop:~$ sudo /dev/cdrom --> /dev/hdc
bash: /dev/hdc: Permission denied
danny@danny-desktop:~$