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IDE CDROM stop working

Posted on 1999-07-31
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Last Modified: 2013-12-15
Hello,
I have an IDE CDROM which works with REDHAT 5.1 (I forgot which version the Linux Kernel it is).  However, I upgrade my system to RedHat 6.1 with kernel 2.5.3 .  I cannot mount my CDROM and also from the boot message seems it ignoring the present of my CDROM.  I swear I have put the IDE-CDROM support option in my kernel configuration.  Can anybody have an idea what I have done wrong ?
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Question by:andrewma
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gunny051499 earned 2460 total points
ID: 1629958
possibility 1:
      you are living on the wrong planet. on this one there is no kernel version 2.5.3 (yet ;)

possibility 2:
      you are using kernel version 2.3.5, and therefore a development kernel.... this latest should tell you all about why you have got a problem (if you did the configuration right). also on kernel 2.3.8/2.3.9 a lot of file-system drivers became broken after a heavy fs change committed by linus. this eventualy should be fixed in 2.3.11.
      attention: atapi-cdrom support is added by simply selecting support for the 2 ide channels. you don't need the special ide drivers there. just, don't forget about the iso9660 fs support.
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by:andrewma
ID: 1629959
Hello,
Sorry, it should be 2.3.5 (I am too eager to the day when 2.5.X will come).  I believe the major problem should be the kernel cannot recognize the /dev/hdc be my CDROM.  When I try to mount it, it rejects with the message :
mount: /dev/hdc is not a valid block device .  This does not happen in the previous kernel such as 2.0.X .  I can still upgrade the Linux distribution since I can boot the Linux CD from this CDROM, and the install kenrel can still recognize it.
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by:gunny051499
ID: 1629960
check out what i posted before. if you set everything fine, try an older/newer kernel. what is the exact detection message you get by the other kernel? use dmesg to check this out. for a atapi hd this would be something like this:

hda: IBM-DTTA-351010, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: IBM-DTTA-351010, 9671MB w/466kB Cache, CHS=1232/255/63, (U)DMA

so what is the output for your cd-rom on the install-kernel?
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Author Comment

by:andrewma
ID: 1629961
Hello,
Nice to you mention that.  The problem is kernel message does not print out the hd information for the CDROM.  The message is as follow :
hda: QUANTUM FIREBALL ST6.4A, ATA DISK drive
hdd: IOMEGA ZIP 100 ATAPI, ATAPI FLOPPY drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: QUANTUM FIREBALL ST6.4A, 6149MB w/81kB Cache, CHS=13328/15/63


It skips the hdc.  

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Expert Comment

by:gunny051499
ID: 1629962
what is the output you get from the install/boot floppy?
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