[expert] cd-rw in 2.2.17 error

[eric]

I already change /etc/fstab and /etc/lilo.conf
/dev/cdrom to /dev/scd0     append            hda=scsi-ide  /* my
Toshiba DVD-cd-r-cdrw combo located */  

if I put in a blank cdrw disk, how should I do, 
ls /mnt/cdrom  ?

or 

 fdisk /mnt/cdrom?

get error on both case
need help and thanks in advance
eric