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Description of problem:
Sorry, but I am not a sys admin nor a linux expert...

IBM xSeries 220 with a lite-on 486s CD-ROM drive.

system reports bad blocks/sectors on hda1 

(took me a while to realize that hda1 is the cd rom and not the first
SCSI disk... spend over a week diganosing the SCSI disks for bad
blocks, replaced one disk, re-installed, replaced SCSI cable... what a
waste of time...)

will not auto mount and cannot "mount /dev/cdrom"

2.5 GB of RAM, and the memory monitor showed almost all as used by "cache"

when I try to shutdown and re-boot, the system hang right after
"unmounting file system" is displayed.

also, some times it will not unmount /usr claiming that the file
system is in use... (which is also one reason I kept looking at the
SCSI drives)

after realizing that the cd rom might be the problem, I took it out,
and put in an Apple brand cd rom drive which was puled out of a G4
Macintosh when I installed a burner in that machine.

so far in three hours the system seems to be just fine, will mount
cds, will shutdown just fine, memory monitor is nearly at the bottom,
i.e. the cache memory is not being used anymore.

there were no problems installing Fedora using the lite-on drive, and
booting into the builting diagnostics of the IBM ROM, which is PC DOS
based, gave the entire machine, cd rom, scsi, mother board, cpu,
memory, etc, a clean bill of health, with over 200 iterations over the
holidays...

So, as far as I can tell, there is some sort of incompatiblity between
the lite-on cd rom drive and Fedora.


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. install Fedora on IBM xSeries 220 with a lite-on cd-rom
2. insert a cd-rom into the drive, will not mount
3. mount /dev/cdrom will not mount
4. shutdown -r now, will hang right at unmounting file system
5. some times bad sector errors on hda1
6. some times will report that it cannot mount /usr since it is busy.
    

Actual Results:  

cd will not mount
system will be very slow and un responsive
memory monitor will show 95%+ of memory used as cache
bad blocks/sectors errors will be reported on hda1
system will hang at shutdonw -r

Expected Results:  

cd should have mounted.
memory should be free
no bad blocks/sectors on hda1
system should not hang on shutdown

Additional info: