cdrom is not a valid block

wnature

I just updated my Redhat9 from 2.4.20 to 2.4.26, after this i cannot mount my cdrom.

I got this message.

[root@gunder mnt]# mount /dev/cdrom
mount: /dev/cdrom is not a valid block device

This is my fstab

LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/hda5 swap swap defaults 0 0
/dev/hdd4 /mnt/zip auto noauto,owner,kudzu 0 0
/dev/fd0 /mnt/floppy auto noauto,owner,kudzu 0 0
/dev/cdrom /mnt/cdrom udf,iso9660 noauto,owner,kudzu,ro 0 0

I cannot figure out the problem, please help me.

on-the-fly

mount  /dev/cdrom -o loop  -o iocharset=cp936  /mnt/cdrom
另外，将/etc/fstab修改为: /dev/cdrom   /mnt/cdrom   udf,iso9660  auto   noauto,
owner,kudzu,ro  0  0