My external DVD hard drive stopped being recognized by my laptop. Originally, it was automatically recognized by just plugging in the USB cable. Here is what the terminal tells me:

me@me-thinkpadx1:~$ wodim --devices 
wodim: Overview of accessible drives (1 found) :
 0  dev='/dev/sg0'  rwrw-- : 'ASUS' 'SDRW-08D2S-U'


me@me-thinkpadx1:~$ sudo mount /dev/sr0 /media/asus_dvd/
mount: /media/asus_dvd: no medium found on /dev/sr0.

Then again :

root@me-thinkpadx1:/home/me# dmesg | tail
[ 1648.756668] usb 1-3: Product: Mass Storage Device
[ 1648.756672] usb 1-3: Manufacturer: USB2.0 External
[ 1648.756674] usb 1-3: SerialNumber: 97 436033521790
[ 1648.760976] usb-storage 1-3:1.0: USB Mass Storage device detected
[ 1648.761333] scsi host0: usb-storage 1-3:1.0
[ 1649.773381] scsi 0:0:0:0: CD-ROM            ASUS     SDRW-08D2S-U     BA01 PQ: 0 ANSI: 0
[ 1649.775314] sr 0:0:0:0: Power-on or device reset occurred
[ 1649.788617] sr 0:0:0:0: [sr0] scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray
[ 1649.806052] sr 0:0:0:0: Attached scsi CD-ROM sr0
[ 1649.806507] sr 0:0:0:0: Attached scsi generic sg0 type 5

I feel like the message "Power-on or device reset occurred" is crucial here, but I do not know how to restore the device properly and get it to work again.

Remarkably, the drive responds to the command :

eject /dev/sr0

Also (not sure it is relevant) I had a look at the /etc/fstab file and looks like this (I removed commented lines)

UUID=fccb78f2-f2ca-47e9-82df-d0d9c4582725 /               ext4    errors=remount-ro 0       1
/swapfile                                 none            swap    sw              0       0


  • The fstab file looks clean (only root partition and swapfile). It's definitely not related to the issue. Can you post the output of lsusb to check if the problem is on the USB cable or bus? The error message no medium found on /dev/sr0 seems to indicate that the drive is unable to read the DVD disc, though.
    – wyphan
    Feb 24, 2021 at 21:09
  • Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 006: ID 138a:0090 Validity Sensors, Inc. VFS7500 Touch Fingerprint Sensor Bus 001 Device 005: ID 04f2:b5c1 Chicony Electronics Co., Ltd Integrated Camera Bus 001 Device 004: ID 8087:0a2b Intel Corp.
    – nicomoliso
    Feb 24, 2021 at 21:14
  • Bus 001 Device 010: ID 1c6b:a223 Philips & Lite-ON Digital Solutions Corporation Mass Storage Device Bus 001 Device 009: ID 1199:9079 Sierra Wireless, Inc. Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A Bus 001 Device 007: ID 056a:5087 Wacom Co., Ltd Pen and multitouch sensor Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    – nicomoliso
    Feb 24, 2021 at 21:15
  • Hmm, it's not the USB cable or bus, since the drive is detected here: Bus 001 Device 010: ID 1c6b:a223 Philips & Lite-ON Digital Solutions Corporation Mass Storage Device
    – wyphan
    Feb 24, 2021 at 21:19
  • Try ejecting a disc from the drive from the command line with sudo eject /dev/sg0 to see if the drive responds?
    – wyphan
    Feb 24, 2021 at 21:21

1 Answer 1


You can try using the GNOME Disks utility to check whether the drive is detected or not, and if it is detected there, whether the DVD disc contains any readable partitions.

  • I have checked. The drive is indeed detected, but the message "No Media" appears in the "Volumes" section. I would add a screenshot, but, apparently, this is not possible in the comments :)
    – nicomoliso
    Feb 24, 2021 at 21:21
  • Interesting. Try swapping the DVD disc and see whether that particular disc is faulty (maybe it wasn't finalized properly after the last burn)?
    – wyphan
    Feb 24, 2021 at 21:23
  • Also tried. Changing DVD disc does not lead to recognition as well
    – nicomoliso
    Feb 24, 2021 at 21:29
  • Hmm. I wonder if it has anything to do with DVD decryption. Try this link: linuxliteos.com/forums/installing-software/…
    – wyphan
    Feb 24, 2021 at 21:33
  • sudo apt install libdvdnav4 libdvdread4 gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly libdvd-pkg Reading package lists... Done Building dependency tree Reading state information... Done Package libdvdread4 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libdvdread4' has no installation candidate
    – nicomoliso
    Feb 24, 2021 at 21:36

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