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AchilleTalon
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Joined: 11 Apr 2004
Posts: 368
Location: Montreal, Quebec, Canada
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 Posted: Thu Feb 17, 2011 5:16 pm Post subject: Audio CD not recognized |
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Hi everyone,
why some audio CD are not recognized at the kernel level? I have two CD, one is just recognized fine on insertion into the CD drive and produces a bunch of messages from the kernel when initially read. The other one is not recognized at all and the kernel produces zero messages on insertion. What's the problem here?
Is there anything I can do to make the kernel, drivers or anything else recognize all the audio CD?
TIA,
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AchilleTalon
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Joined: 11 Apr 2004
Posts: 368
Location: Montreal, Quebec, Canada
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| Posted: Fri Feb 18, 2011 6:42 pm Post subject: |
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They are original CD.
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ewaller
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Joined: 11 Aug 2005
Posts: 264
Location: Pasadena, CA
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| Posted: Fri Feb 18, 2011 7:07 pm Post subject: |
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Just out of curiosity, are any of the CDs from Sony?
Remember the Sony rootkit fiasco from a couple years back? Sony placed a small file system on the audio disks that other operating systems would automount / autorun / and install scumware that prevented the ripping of music from all audio disks. It hid this little gem behind a root kit.
Is there any correlation between the publisher and whether the disk generates a response by the kernel?
edit: fixed typo
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AchilleTalon
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Joined: 11 Apr 2004
Posts: 368
Location: Montreal, Quebec, Canada
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| Posted: Mon Feb 21, 2011 9:04 pm Post subject: |
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Hum, this is from Sony Entertrainment and distributed by RCA/Jive which is a unit of Sony. The title is: The Priests.
Any way to circumvent this rootkit?
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ewaller
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Joined: 11 Aug 2005
Posts: 264
Location: Pasadena, CA
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| Posted: Tue Feb 22, 2011 1:19 am Post subject: |
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| Quote: | | Any way to circumvent this rootkit? |
Don't place it in a computer running Windows. If you do, don't enable autorun.
I don't think your disk is one of the one with a rootkit:
http://www.eff.org/deeplinks/2005/11/are-you-infected-sony-bmgs-rootkit
I think the real issue is that some CDs have a data session (for some undetermined reason), whereas true audio CDs don't (and should not -- according to Phillips) IIRC, Phillips was objecting to the use of "CD" (which they license) for audio disks that violate their standard.
In general, audio CDs don't have a file system, per se. You cannot normally mount them as you do Data CDs or DVDs. Some of the desktop environments create the illusion of a file system on audio CDs by creating icons organized files in a file system with duration information from the disk, and often track information retrieved from the net. Copying or acting on these files cause the system to treat the tracks as files by ripping files "on-the-fly" to dynamically create wav, ogg, or mp3 files.
If an audio "CD" has a data session, be wary.
edit: Fixed typo
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AchilleTalon
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Joined: 11 Apr 2004
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Location: Montreal, Quebec, Canada
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| Posted: Wed Feb 23, 2011 9:38 pm Post subject: |
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Anything can be done to have these CD being ripped/read with Linux? Windows is not an option for me.
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wcg
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Joined: 06 Jan 2009
Posts: 588
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| Posted: Tue Mar 01, 2011 11:02 pm Post subject: |
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Try a mount. Put the cd in the drive, and from a text-mode console or terminal
window (like xterm) issue "mount /dev/cdrom /mnt/cdrom", meaning run
mount without a "-t [fstype]" option, so that mount will run its autodetection
logic to figure out what kind of filesystem is on the cd.
If the cd is in audio cd format, the end of the mount output will have
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FAT: unable to read boot sector
mount: /dev/[real device]: can't read superblock
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If the disk is in iso9660 data format, mount will issue some messages
about the disk being read-only, any iso9660 extensions like Joliet
in the disk headers, and end its output with
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ISOFS: changing to secondary root
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(If you get messages about permissions or device not found or something
like that, check to make sure that /dev/cdrom and /mnt/cdrom both exist
and try it again as root. /dev/cdrom is usually a symbolic link to some
real device like /dev/sr0.)
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