If cdrom is not mounted by default, you can use the following...
[root@sama mnt]# cd /media/
[root@sama media]# ls
[root@sama media]#
[root@sama mnt]# cd /media/
[root@sama media]# ls
[root@sama media]#
[root@sama /]# mount -t iso9660 /dev/cdrom /mnt
mount: block device /dev/sr0 is write-protected, mounting read-only [root@sama ~]# dmesg | tail
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
SELinux: initialized (dev rpc_pipefs, type rpc_pipefs), uses genfs_contexts
eth0: no IPv6 routers present
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
SELinux: initialized (dev sr0, type iso9660), uses genfs_contexts
[root@sama ~]#
[root@sama ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_sama-lv_root
41G 5.6G 33G 15% /
tmpfs 1011M 88K 1011M 1% /dev/shm
/dev/sda2 485M 30M 430M 7% /boot
/dev/sr0 2.9G 2.9G 0 100% /mnt
[root@sama /]# cd /mnt
[root@sama mnt]# ls # eject -v /dev/cdrom-device && mount -v /dev/cdrom-device && echo $? Mounting an ISO Image # mount -o ro,loop My_ISO_Image.iso /media/cdrom
Creating a Shared Mount Pointby default removable media is mounted at /media and /mnt for temporary mount point. Using the shared mount, you can share the same content on both shared.
Now, make /media directory as a shared one,
# mount --bind /media /media
# mount --make-shared /media
now, create duplicate in /mnt
# mount --bind /media /mnt
Verify the info.
# mount /dev/cdrom /media/cdrom
# ls /media/cdrom
# ls /mnt/cdrom
You can also verify info with USB dirve as well.
# mount /dev/dsc1 /mnt/flashdisk
# ls /media/flashdisk
# ls /mnt/flashdisk
https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/sect-Using_the_mount_Command-Mounting-Bind.html 