Red Hat Bugzilla – Bug 7772
Can't mount ISO-9660 CD-ROM after playing music CD
Last modified: 2008-05-01 11:37:53 EDT
On RedHat 6.1, using an Afreey 45x IDE CD-ROM drive, whenever I play a music CD-ROM, I can never afterwards mount a data CDROM (RedHat 6.1 distribution CD, say). Here's the error I see: mount: wrong fs type, bad option, bad superblock on /dev/cdrom, or too many mounted file systems Of course, the problem goes away if I reboot. If it makes any difference, I'm using the SMP kernel on a multi-CPU system.
Does your kernel have iso9660 compiled as a module by any chance? If so, is the above also true if you run the following command between playing the music CD and trying to mount a data CD: modprobe iso9660 ------- Email From Rob McMillin <robm@pricegrabber.com> 12/12/99 16:55 ------- Attached to Bug # 7772. ------- Email From Rob McMillin <robm@pricegrabber.com> 12/12/99 16:57 ------- Attached to Bug # 7772.
Rob McMillin <robm@pricegrabber.com> asks: Q> How would I know this? Three tests for you to do: 1. Type `grep iso9660 /proc/filesystems | wc -l` and advise. 2. If the above returned zero, type `modprobe iso9660` and then repeat test 1. Do not repeat this more than once. 3. Type `lsmod | grep iso9660 | wc -l` and advise. Analyse the results as follows: Test 1 Test 2 Test 3 Result ~~~~~~ ~~~~~~ ~~~~~~ ~~~~~~ 0 0 0 Not compiled or not available 0 0 1 Impossible combination 0 1 0 Impossible combination 0 1 1 Compiled as a module 1 0 0 Impossible combination 1 0 1 Impossible combination 1 1 0 Hard compiled into kernel (Monolithic) 1 1 1 Compiled as a module Basically, if you get either of the "Compiled as a module" lines (or even if you don't), try playing a music CD, take the music CD out of the drive, issue the stated command of `modprobe iso9660` and then insert a data CD in the drive and try to mount that and report on the result. ------- Email From Rob McMillin <robm@pricegrabber.com> 12/12/99 17:40 ------- Attached to Bug # 7772.
Looks like your audio CD player doesn't correctly release the CD when it's done playing... Which CD player are you using? Does it still happen if you use a different one?
Q> Okay, so it looks like the answer is "Hard compiled into kernel Q> (Monolithic)". That tends to imply that it's something the drive is doing, rather than anything the kernel is doing. One thing you might wish to try is to compile a kernel with the iso9660 file system comiled as a module, then try the following: 1. Use a data CD, then play a music CD, then unload the iso9660 fs driver, then load the iso9660 fs driver, then use a data CD. 2. Use a data CD, then unload the iso9660 fs driver, then play a music CD, then load the iso9660 fs driver, then use a data CD. If one of the above works and the other doesn't, that could easily give one of the developers a clue as to precicely what the problem is.
Closing due to lack of user input