Mounting Error: "The given volume was not found."

I'm using Ubuntu.

I'm using this forum on my phone so I have to type this all out, forgive any formatting issues!

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 7.3G 0 loop
- encstateful 235:1 0 7.3G 0 dm /var/host/timezone
loop1 7:1 0 433.7M 1 loop
loop2 7:2 0 4K 1 loop
loop3 7:3 0 4K. 1 loop
loop4 7:4 0 46.9M 1 loop
zram0 252:0 0 5.6G 0 disk (SWAP)
mmcblk0rpmb 179:48 0 4M 0 disk
mmcblk0boot0 179:16 0 4M 1 disk
mmcblk0boot1 179:32 0 4M 1 disk
mmcblk0 179:0 0 29.1G 0 disk
-mmcblk0p1 179:1 0 25G 0 part /mnt/dvd
-mmcblk0p2 179:2 0 16M 1 part
-mmcblk0p3 179:3 0 2G 1 part
-vroot. 253:0 0 1.9G 1 dm. /lib/modules/3.18.0-19838-gc647e70c954a
-mmcblk0p4 179:4 0 16M 0 part
-mmcblk0p5 179:5 0 2G 0 part
-mmcblk0p6 179:6 0 512B 0 part
-mmcblk0p7 179:7 0 512B 0 part
-mmcblk0p8 179:8 0 16M 0 part
-mmcblk0p9 179:9 0 512B 0 part
-mmcblk0p10 179:10 0 512B 0 part
-mmcblk0p11 179:11 0 8M 0 part
-mmcblk0p12 179:12 0 16M 0 part

I assumed by DVD-ROM and external drive you were using an USB optical drive of some type and would of expected a /dev/sr0 device ID. I don't so I am confused.

I still do not know what linux distribution you installed and it looks like you are running something from RAM. Granted I don't have much experience with Chromebooks.

mmcblk0p1 179:1 0 25G 0 part /mnt/dvd

Looks like you have mounted partition 1 of the internal drive as /mnt/dvd.

To be fair, I am also very confused.

If the device can't even be found then what am I supposed to do? I may have to see if I can find the files online instead and give up on this endeavor.

Thanks anyways guys! If you still have suggestions feel free to give them.

I'm confused too - but assuming you have maybe mounted the DVD(?)
Does entering the following command into the terminal show anything recognisable?

ls -l /mnt/dvd

loop is a mounted file

mmcblk0 is likely your internal storage, especially on a chromebook, but could also be microSD card

zram0 is a compressed file system in ram, swap in this case

vroot is likely to be your system loaded to ram, or a mounted file

So, having explained, roughly, what you are looking at, with my chromebook, external media was given the /dev/sda designation, so you may find that your DVD is mounted there.

Open a terminal, plug in your DVD, type

dmesg | tail

you should then see what your O/S thinks it is.
Use that to mount it.
If it says it is /dev/sda, then, in the terminal

mount /dev/sda /mnt

Then you should be able to see your files in the /mnt directory

ls /mnt

Devices can be difficult to understand. However, after working with them for awhile, you'll get it.

On most distros, /dev/sr0 is used for internally mounted optical drives (CD,DVD). As per fatmac, /dev/sda may be the device name for a USB mounted optical drive.

Always,always,always put the disk in the drive before attempting to mount. The disk has the data and mount needs to see data (or an empty disk - writable drives).

Try this - plug in the drive with disk in it and type in the terminal

lsusb

This should list all USB devices currently plugged into the system. Look for the title of the DVD/ROM drive. This listing should also tell the device name used for mounting.

Once you have that info and your mount point (seems you've worked thru this), enter in terminal

sudo mount /dev/??? /mnt/dvd

??? will be the ACTUAL name of the device in the list (sda?) you will be asked for your password by sudo - give it and if you get no msgs and a new prompt - bingo you,ve mounted your DVD/ROM drive.

Final test is to navigate to your mount point, either in terminal or using the file manager. In terminal, enter

cd /mnt/dvd

and then

ls

You should see the files on the disk. In the file manager, start in 'File System' click mnt and then dvd, your files should then be visible.