cannot eject cd
 

I cannot eject cd/dvd. Message comes permission denied.
Please tell me what are the permissions to su/root and normal user as far as cdrom is cocerned?
Tell me settings so I can read,mount/unmount cd/dvd and eject it.
fstab entries are as follows--
/dev/sda10 / reiserfs acl,user_xattr 1 1
/dev/sda11 /home reiserfs acl,user_xattr 1 2
/dev/sda1 /windows/C ntfs ro,users,gid=users,umask=0002,nls=utf8 0 0
/dev/sda5 /windows/D ntfs ro,users,gid=users,umask=0002,nls=utf8 0 0
/dev/sda6 /windows/E ntfs ro,users,gid=users,umask=0002,nls=utf8 0 0
/dev/sda7 /windows/F ntfs ro,users,gid=users,umask=0002,nls=utf8 0 0
/dev/sda8 /windows/G ntfs ro,users,gid=users,umask=0002,nls=utf8 0 0
/dev/sda9 swap swap defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs noauto 0 0
debugfs /sys/kernel/debug debugfs noauto 0 0
usbfs /proc/bus/usb usbfs noauto 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
/dev/hdb /media/ iso9660 noauto,users,fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0

chmod a+w /dev/hdb (if it is you cd-rom) will help you. Formally, it is dangerous, as far as I remember, if you are reading from an RW, someone malicious (virus, for example) can wipe it, but I consider this risk theoretical. Never forget about it, though. And it is better to use sudo.