apt-get install genisoimage

$ isoinfo dev=/dev/sr0 -d
CD-ROM is in ISO 9660 format
System id: C@-RTKS C@-BRIDCE
Volume id: antartica
Volume set id:
Publisher id:
Data preparer id:
Application id: CAUAF File System - Adaptec
Copyright File id:
Abstract File id:
Bibliographic File id:
Volume set size is: 1
Volume set sequence number is: 1
Logical block size is: 2048
Volume size is: 297247
NO Joliet present
NO Rock Ridge present

$ a=2048                # Block size read above.
$ b=297247              # Volume size. Near 300.000 for a 600Mega disk
$ dd if=/dev/sr0 bs="$a" count="$b" | md5sum

$ dd if=/dev/sr0 bs="$a" count="$b" | sha512sum