Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
cd/dvd drive unable to mount
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware
View previous topic :: View next topic  
Author Message
berardel
n00b
n00b


Joined: 03 Mar 2018
Posts: 34
Location: United States

PostPosted: Fri Mar 09, 2018 3:30 am    Post subject: cd/dvd drive unable to mount Reply with quote

so whenever i try to mount the drive, it will always say something along the lines of "bad superblock" cannot read. no programs can read it either. im using kernel version 4.9.76 and the LG GH24 disk drive. does someone know what i can change in order to make it be readable?
Back to top
View user's profile Send private message
russK
l33t
l33t


Joined: 27 Jun 2006
Posts: 630

PostPosted: Fri Mar 09, 2018 4:15 am    Post subject: Reply with quote

berardel,

what type of disc are you putting in the drive?
Back to top
View user's profile Send private message
Hu
Moderator
Moderator


Joined: 06 Mar 2007
Posts: 13836

PostPosted: Fri Mar 09, 2018 4:42 am    Post subject: Reply with quote

What is the output of file -s /path/to/optical/block/device?
Back to top
View user's profile Send private message
berardel
n00b
n00b


Joined: 03 Mar 2018
Posts: 34
Location: United States

PostPosted: Fri Mar 09, 2018 5:20 am    Post subject: Reply with quote

russK wrote:

what type of disc are you putting in the drive?

oh forgot to mention this part, im just using a regular CD
Quote:
What is the output of file -s /path/to/optical/block/device?

it just says empty
Back to top
View user's profile Send private message
The Doctor
Moderator
Moderator


Joined: 27 Jul 2010
Posts: 2574

PostPosted: Fri Mar 09, 2018 5:25 am    Post subject: Reply with quote

You don't mount DVDs or CDs. You just play them. They do not contain a file system.
_________________
First things first, but not necessarily in that order.

Apologies if I take a while to respond. I'm currently working on the dematerialization circuit for my blue box.
Back to top
View user's profile Send private message
berardel
n00b
n00b


Joined: 03 Mar 2018
Posts: 34
Location: United States

PostPosted: Fri Mar 09, 2018 5:27 am    Post subject: Reply with quote

The Doctor wrote:
You don't mount DVDs or CDs. You just play them. They do not contain a file system.

hmm, but im trying to burn a disk with brasero, except whenever i put in a disk, it doesnt detect it.
Back to top
View user's profile Send private message
berardel
n00b
n00b


Joined: 03 Mar 2018
Posts: 34
Location: United States

PostPosted: Fri Mar 09, 2018 5:31 am    Post subject: Reply with quote

The Doctor wrote:
You don't mount DVDs or CDs. You just play them. They do not contain a file system.

ok wait i know what im doing wrong actually, i was trying to run the program as just regular user, but i need to be root to mount the disks. do you know what i can change though to allow normal users to mount disks?
Back to top
View user's profile Send private message
scdbackup
n00b
n00b


Joined: 19 Oct 2014
Posts: 20
Location: Germany

PostPosted: Fri Mar 09, 2018 8:46 am    Post subject: Reply with quote

I have to contradict the statement by The Doctor.

CDs may have filesystems on them, if they were written as data discs
(CD-ROM). The other main CD format is audio (CD-DA), which is indeed not
mountable and not even readable with the normal SCSI READ command for
storage devices.

Written DVD and BD media are always readable as storage devices. Usually
they contain ISO 9660 or UDF filesystems. UDF is prescribed for
entertainment video players, but not necessarily for general data storage.

Typical examples for CD and DVD with ISO 9660 filesystem are the installation
media images of Gentoo at https://www.gentoo.org/downloads/ .

A special feature of many CD, DVD, and BD types is that they can be unwritten
and thus bear nothing to read yet.
Back to top
View user's profile Send private message
NeddySeagoon
Administrator
Administrator


Joined: 05 Jul 2003
Posts: 43184
Location: 56N 3W

PostPosted: Fri Mar 09, 2018 10:02 am    Post subject: Reply with quote

scdbackup,

For completeness entertainment DVDs and Blurays cannot normally be played or ripped using the filesystem.
Its usually deliberately corrupted or incomplete to prevent that.
Both formats are played using a blocklist, just like CD-DA.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
Back to top
View user's profile Send private message
scdbackup
n00b
n00b


Joined: 19 Oct 2014
Posts: 20
Location: Germany

PostPosted: Fri Mar 09, 2018 10:52 am    Post subject: Reply with quote

Neddy Seagoon wrote:
> For completeness entertainment DVDs and Blurays cannot normally be
> played or ripped using the filesystem.

There may well be obstacles for computer access to the proprietary
content. But other than with audio CD, the video DVD and BD specs demand
an UDF filesystem. (See wikipedia "DVD-Video" and "Blu-ray".)

> Both formats are played using a blocklist, just like CD-DA.

CD-DA has a Table-Of-Content (like all optical media) where the start
and end sectors of the tracks are recorded. (Wikipedia "Compact Disc
Digital Audio".)
Additionally to the track limits, there are "Index" points inside the
CD tracks which one can hop to by an audio player or ripping program.
(See MMC-5, 4.2.3.3 Frame Adressing, ff., and 6.26 READ TOC/PMA/ATIP
Command.)
The Table-Of-Content of DVD and BD does not bear these indice.

My point is that CD, DVD, and BD can well contain mountable filesystems.
But of course one can put data onto them which need special software to
be decoded. Not only by unusual access structures but also by encryption.

(I clearly belong to user group 2: At least 5 ISO 9660 backups per day
on DVD and BD multi-session discs.)
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum