Create an ISO file from a CD or DVD

by Ramesh

First, find the volume size and the block size of the CD or DVD as shown below using isoinfo command.

Syntax: isoinfo -d -i DEVICE-Of-CD-DVD
 
# isoinfo -d -i /dev/cdrom
 
    CD-ROM is in ISO 9660 format
    System id: WIN32
    Volume id: RQ0010
    Volume set id:
    Publisher id:
    Data preparer id:
    Application id: ULTRAISO V9.3 CD & DVD CREATOR, (C)2008 EZB SYSTEMS, INC.
    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: 1825
    Joliet with UCS level 3 found
    NO Rock Ridge present

Next, copy the CD or DVD image as an ISO file using the dd command as shown below.

# dd if=/dev/cdrom bs=2048 count=1825 of=mydata.iso
 
    1825+0 records in
    1825+0 records out
    3737600 bytes (3.7 MB) copied, 4.43782 seconds, 842 kB/s