Problem with compiled kernel 2.6.26fc+ unable to identify cdrom format

[alok pandey]

It's happenings with all cd, apparently , that same cd  get mounted
successfully on other linux machines.

What to do next ..?
--Alok


On 4/13/09, Rick Stevens <ricks at nerd.com> wrote:
>
> alok pandey wrote:
>
>> HI,
>> Still waiting for response, putting some more information for your better
>> understanding.
>>
>> Exact error: in dmesg
>> scsi 4:0:0:0: Direct-Access Dell Virtual Floppy 123 PQ: 0 ANSI: 0 CCS
>> scsi 3:0:0:0: CD-ROM Dell Virtual CDROM 123 PQ: 0 ANSI: 0 CCS
>>
>
> If you see this, then the kernel knows about your CD-ROM device.  This
> is not a kernel issue.
>
> sd 4:0:0:0: [sdc] Attached SCSI removable disk
>>  "ISOFS: Unable to identify CD-ROM format"
>>
>
> That's pretty obvious.  The CD isn't burned correctly.
>
> Btw, I can mount ISO image successfully (i.e mount -t iso9660 -o lo
>> /path/to/image /mount/point), So i am sure FS is well supported.
>>
>
> It is.  This is not a kernel or FS issue, it's a media problem.  The CD
> you're feeding your machine is NOT an ISO9660 CD.  The ISO image is
> fine since you can mount it via loopback, but the CD itself is burned
> incorrectly.
>
>
>> Attaching my config files as.
>> LSPCI.txt :-> output of LSPCI command
>> image-kernel-smpx86.conf:-> Kernel config paramater
>> Bootfloppy-kernelXX.conf:->Boot image kernel config
>>
>> I have compiled the kernel to support cd-rom with my best linux knowledge,
>> but unfortunately it's not working for me. I am quit sure that my kernel
>> have all the required option enabled , it seems to me as kernel bug.
>>
>> You comment/suggestion is needed. Plz help.
>>
>> Thanks
>> Alok Pandey
>>
>> On 4/10/09, alok pandey <alok.rhct at gmail.com> wrote:
>>
>>> HI All,
>>> Recently  I compiled a linux fedora kernel (2.6.27fc_x86_64bit) for stata
>>> support. After successful compilation and installation with new kernel,
>>> :-
>>>  --System is not able to mount cdrom.
>>>  --Always generate error, "medium not found"
>>> --dmesg have an  entry some thing like " unable to understand cdrom
>>> format"
>>>
>>> I don't know what went wrong, but i cross checked my new kernel config
>>> and
>>> my new kernel have following support:- (in respect of cdrom)
>>>  --SCSI device drive support [*]
>>> --iso9660 file system support [*]
>>> --ata-ide device support [*]
>>>
>>> I am attaching my kernel.conf file as attachment for better
>>> understanding.
>>> let me know if some other information is need in order to understand my
>>> issue.
>>>
>>> Also,
>>> I am highly confused in selection of modules as static or dynamic. It
>>> will
>>> be great help if any one can suggest me the rule/law behind dynamic[M]
>>> and
>>> static[*] selection of kernel modules.
>>>
>>> *I just need to ask , what if i select all kernel modules as lodable
>>> modules [M] instead of static modules [*] or vice versa !!
>>>
>>> Thanks
>>> -A
>>>
>>>
>>
>>
>>
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>
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-- 
Thanks
ALOK PANDEY
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