i was going to post about a similar problem myself

ive been watching a dvd and copying files all morning, and suddenly, one of the cdroms stops working....so i reboot, and now the cdrom AND the dvd burner dont work

heres my fstab


----------------------
# /etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hda1 / ext3 defaults,errors=remount-ro 0 1

proc /proc proc defaults 0 0
/dev/fd0 /floppy vfat defaults,user,noauto,showexec,umask=022 0 0
usbdevfs /proc/bus/usb usbdevfs defaults 0 0
sysfs /sys sysfs defaults 0 0
/dev/cdrom /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom1 /cdrom1 iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/dvd /dvd iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdaudio /cdaudio iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom1 /mnt/auto/cdrom1 auto users,noauto,exec,ro 0 0
# Added by KNOPPIX
/dev/hda5 none swap defaults 0 0
# Added by KNOPPIX
/dev/hda6 /mnt/hda6 ext3 noauto,users,exec 0 0
# Added by KNOPPIX
/dev/hda7 /mnt/hda7 ntfs noauto,users,exec,ro,umask=000 0 0
# Added by KNOPPIX
/dev/hda8 /mnt/hda8 vfat noauto,users,exec,umask=000 0 0

----------------------------------------

i had this happen on a previous install thinking i had messed it up myself trying to fix things, but this is bizarre, what causes this and how can it be fixed?