How to add a usb-CDROM to TX2 platform?

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi,everyone:
Now I want to add a usb-cdrom device to TX2 platform. I can only found the device when use lsusb command, but when I use fdisk -l I can’t see the device and I can’t find /dev/cdrom in /dev directory. I already add ISO9660_FS driver to system but there is no effect. Please give me some advice or guide, thank you.

2

I haven’t used this recently, but in the past just adding ISO9660 was enough (assuming it is an ordinary data CD or DVD). Does “lsusb” show the drive? If that shows then it comes down to file system types or other drivers…if that doesn’t show, then it never had the chance.

Also, the name tends to be one of the read-only SATA names these days…if there is a “/dev/cdrom”, then it is from a udev rule adding a symbolic link. Do you have “/dev/sr0”? If you monitor dmesg via “dmesg --follow” while plugging in the USB cable and adding a CD to the device does this show anything?

3

When I plugin the usb-CDROM I found message in kern.log:

pr 25 09:28:32 tegra-ubuntu kernel: [ 3638.894380] usb 1-2.1: new high-speed USB device number 6 using xhci-tegra
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.004269] usb 1-2.1: New USB device found, idVendor=0e8d, idProduct=1806
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.004306] usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.004326] usb 1-2.1: Product: MT1806 
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.004345] usb 1-2.1: Manufacturer: MediaTek Inc
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.004362] usb 1-2.1: SerialNumber: RJ6X751 
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.009394] xhci-tegra 3530000.xhci: tegra_xhci_mbox_work mailbox command 6
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.012237] usb-storage 1-2.1:1.0: USB Mass Storage device detected
Apr 25 09:28:32 tegra-ubuntu kernel: [ 3639.012830] scsi host3: usb-storage 1-2.1:1.0
Apr 25 09:28:33 tegra-ubuntu kernel: [ 3640.013448] scsi 3:0:0:0: CD-ROM            TSSTcorp CDDVDW SE-S084F  TB00 PQ: 0 ANSI: 0

where the device map to system?

4

when I use lshw -short command I get these message:

H/W path  Device  Class      Description
========================================
                  system     quill
/0                bus        Motherboard
/0/0              processor  a57_cluster_power_states
/0/1              processor  a57_core_power_states
/0/2              processor  a57_crossover_thresholds
/0/3              processor  cpu
/0/4              processor  cpu
/0/5              processor  cpu
/0/6              processor  cpu
/0/7              processor  cpu
/0/8              processor  cpu
/0/9              processor  denver_cluster_power_states
/0/a              processor  denver_core_power_states
/0/b              processor  denver_crossover_thresholds
/0/c              processor  l2-cache0
/0/d              processor  l2-cache1
/0/e              memory     7851MiB System memory
/1        usb2    bus        xHCI Host Controller
/1/1              bus        4-Port USB 3.0 Hub
/2        usb1    bus        xHCI Host Controller
/2/2              bus        4-Port USB 2.0 Hub
/2/2/1            storage    MT1806

but I can’t find any device in /dev directroy.

5

What shows up on dmesg when insert or remove a CD/DVD (I am assuming a data CD with ISO9660)? Typically the first one will be “/dev/sr0” (read-only SCSI…SATA is sort of an IDE-to-SCSI adapter). Other names would be from udev rules (note that a controller without a disk won’t show a device…no CD/DVD implies no disk, just a bare controller).