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roygbiv

Member

Registered: 2011-05-18

Posts: 204

Bad superblock on /dev/sr0

I'm trying to mount a Pink Floyd CD manually, just so I can browse its content but it doesn't work:

$ sudo mount -t iso9660 /dev/sr0 /mnt/cd_dvd/
mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

$ dmesg | tail
[ 1370.241820] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
[ 1374.496878] sr 1:0:0:0: [sr0]  Result: hostbyte=0x00 driverbyte=0x08
[ 1374.496884] sr 1:0:0:0: [sr0]  Sense Key : 0x5 [current] 
[ 1374.496889] sr 1:0:0:0: [sr0]  ASC=0x64 ASCQ=0x0
[ 1374.496893] sr 1:0:0:0: [sr0] CDB: cdb[0]=0x28: 28 00 00 00 00 10 00 00 01 00
[ 1374.496903] end_request: I/O error, dev sr0, sector 64
[ 1374.496935] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16

What could be the reason for this? I am able to play the cd in VLC without problems. Could this be related to some scratches on the cd surface?

Last edited by roygbiv (2011-12-02 17:16:29)

.:B:.

Forum Fellow

Registered: 2006-11-26

Posts: 5,819

Website

Re: Bad superblock on /dev/sr0

The reason is you cannot mount Audio CD's. Not now, not ever.

ISO9660 is a format, and Audio CD's have to comply with the Redbook specification; not with ISO9660 format specs.

Last edited by .:B:. (2011-12-02 17:21:29)

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roygbiv

Member

Registered: 2011-05-18

Posts: 204

Re: Bad superblock on /dev/sr0

I'm confused. Doesn't the cd have a filesystem (iso9660), and this filesystem should be mounted somewhere in order to access it?

.:B:.

Forum Fellow

Registered: 2006-11-26

Posts: 5,819

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Re: Bad superblock on /dev/sr0

ISO9660 is a format for optical data discs.

Red book specification

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roygbiv

Member

Registered: 2011-05-18

Posts: 204

Re: Bad superblock on /dev/sr0

Allright, but is there a way to browse it like a filesystem, or is it only possible to extract it to disk?

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: Bad superblock on /dev/sr0

You can't copy a track from an AudioCD, you need to rip it, right? If there was a filesystem, you could just copy it.
You can mount a data CD / DVD, but neither AudioCDs not blank discs have a filesystem.

Edit:

Allright, but is there a way to browse it like a filesystem, or is it only possible to extract it to disk?

Have you tried e.g. http://www.archlinux.org/packages/?name=cdfs ?

Last edited by karol (2011-12-02 17:38:35)

.:B:.

Forum Fellow

Registered: 2006-11-26

Posts: 5,819

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Re: Bad superblock on /dev/sr0

Allright, but is there a way to browse it like a filesystem, or is it only possible to extract it to disk?

A CD ripping program, of course. Or something like cdfs.

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ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,293

Re: Bad superblock on /dev/sr0

I believe that the abstraction provided by things like Microsoft Windows and KDE add to this confusion.  Those systems create user interfaces that provide the illusion there is an underlying file system on Audio CDs.  As long as you remember that it is an illusion, you might try "browsing" the Audio CDs with Dolphin and the Audio CD kioslave.

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roygbiv

Member

Registered: 2011-05-18

Posts: 204

Re: Bad superblock on /dev/sr0

I believe that the abstraction provided by things like Microsoft Windows and KDE add to this confusion.  Those systems create user interfaces that provide the illusion there is an underlying file system on Audio CDs.  As long as you remember that it is an illusion, you might try "browsing" the Audio CDs with Dolphin and the Audio CD kioslave.

That is true. For end-users this is a convenient feature when using an OS because then they don't actually need to know the difference between Audio CD formats and CD-ROM formats - which in this case I was not aware of before now. Reading the wikipedia article on the Rainbow Books did clear things up.

Have you tried e.g. http://www.archlinux.org/packages/?name=cdfs ?

Thanks, I tried it and it froze my computer until I ejected my cd. I will try more of this later on.

br1ttle

Member

Registered: 2022-02-06

Posts: 1

Re: Bad superblock on /dev/sr0

The reason is you cannot mount Audio CD's. Not now, not ever.

ISO9660 is a format, and Audio CD's have to comply with the Redbook specification; not with ISO9660 format specs.

Mate, I have busted my balls on this for the past 4 hours. Thank you for this.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,564

Re: Bad superblock on /dev/sr0

Please don't necrobump 10 year old threads, even if they did teach you something you didn't know.

https://wiki.archlinux.org/title/Genera … bumping%22

Closing.