dd if-/dev/sdb of=./input
~$ sudo mkdir /media/iso
~$ sudo modprobe loop
~$ sudo mount input /media/iso/ -t iso9660 -o loop
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.