[root@localhost ]# mount -t iso9660 /dev/hdb /mnt/cdrom
mount: /dev/hdb is not a valid block device
[root@localhost ]# mount -t iso9660 /dev/cdrom /mnt/cdrom
mount: /dev/cdrom is not a valid block device
内核中file systems-CD-ROM/DVD filesystems里已经选中了ISO9660 cdrom files system support.