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Old 02-18-2005, 05:07 AM   #1
Cogvos
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Registered: Feb 2005
Distribution: Suse 9.3 also Redhat 9, Umbuto, Mandriva 2005
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Unhappy Bad super block, too many mounted fs error when mounting CD rom


Dear all,

This is my first post to this forum, so hello and erm help...

MY hardware.

Old (v old) compaq deskpro 200mhz pentium 1.
2 HDs running at UDMA on IDE 0
1 ls120 running in PIO mode 0 on IDE1 (master)
1 CD/RW (sorry can't remember the maker) running in PIO mode 0 on IDE 1 as slave.

I am running Redhat 9.0 straight out of the box with no kernal patches or really anything that I can see that would cause the below.

Last Saturday my CD/RW worked. Last night it didn't. Today it didn't.

When I try to mount I get the
mount: wrong fs type, bad option, bad superblock on /dev/cdrom,
or too many mounted file systems

Message, which has caused a few other posters problems. Sadly going through the threads hasn't solved mine.

mount -t iso9660 /dev/cdrom /mnt/cdrom

gives this error.

/etc/fstab is set up as out of the box.

The kernal option states hdd=ide-scsi

I get IO errors when I

dd if=/dev/cdrom of=/dev/null bs=2048

dmsg is odd (sorry I'm not at the machine at present so can't give an exact dump but...)

The CD/RW is recognised. I've set the bios mode to PIO/0 (In desparation) and dmsg finds the drive, stating that its assuming 33mhz PIO mode.

Yet at the end I get I/O errors stating that the CD is being accessed in UDMA mode (???)

I'm assuming that something has glitched but not what.

The CD works fine in Win95 and 98SE so I don't think its a hardware problem.

Does anyone have any ideas? What additional info do you need?

I have a feeling that a Linux reinstall will fix this, since the CD has worked. But Would prefer to fix it so that I don't have to and also learn in the process.

Hop you can help.
 
Old 02-18-2005, 06:18 AM   #2
satinet
Senior Member
 
Registered: Feb 2004
Location: England
Distribution: Slackware 14.2
Posts: 1,491

Rep: Reputation: 50
A few steps:

check that /dev/cdrom is not broken, as it is actually a sybolic link.
Check that /mnt/cdrom exists (that isn't your problem though).
check that /dev/hdd is actually your cdrom drive.... (it might be hdc)
Sorry - you can 'tail' a certain file that gives you output when you insert a disc. But I can't recall...
it may be that your device is actually /dev/sr0 or something. Although I haven't used an old kernel for a while and can't remember how devices are created.... Sorry!


I think you need to post /etc/fstab and the bit of dmesg relating to the drive.


Why are you running it in PIO mode? Is it really old?

Which kernel version are you running?

Anyway, if it was working before, it's strange that it's not working now.

If you've manually set the UDMA stuff in your bios then i would say you may get a problem there. As experience by your I/O errors. I.e how the kernel is trying to address the hardware...

Last edited by satinet; 02-18-2005 at 07:31 AM.
 
Old 02-18-2005, 07:19 AM   #3
satinet
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Registered: Feb 2004
Location: England
Distribution: Slackware 14.2
Posts: 1,491

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when you find you device, run 'hdparm <device name>' on it

check the man page for hdparm
 
  


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