LinuxQuestions.org - About growisofs flag

From memory, there isn't one. Offhand, the only 2 ways I can think of are:

1. The quickest way is to mount the disk and see if the file-system is accessible;

2. A slower, but more thorough way is to compare the md5sum of the original .iso to that of the disc contents.

Getting the md5sum of the original iso is just md5sum /pathto/some.iso - Getting the md5sum of the disc can be done with dd /dev/dvd | md5sum

I don't use dd by itself, I use the following script as it's always been more reliable for me:

Code:

#!/bin/sh

#

# See <http://www.troubleshooters.com/linux/coasterless.htm>

# Reads directly from the CD or DVD device specified on the command line amd dumps it to STDOUT

#

# Typical usage:

#  copy-raw-cd.sh /dev/dvd > /tmp/dvd-contents.iso

#

# To use this script to check the md5sum of the DVD, do the following:

#  copy-raw-cd.sh /dev/dvd | md5sum

# compare the result with:

#  md5sum /tmp/dvd-contents.iso

#



device=$1



blocksize=`/usr/bin/isoinfo -d -i $device | grep "^Logical block size is:" | cut -d " " -f 5`

if test "$blocksize" = ""; then

  echo $0 FATAL ERROR: Blank blocksize >&2

  exit

fi



blockcount=`/usr/bin/isoinfo -d -i $device | grep "^Volume size is:" | cut -d " " -f 4`

if test "$blockcount" = ""; then

  echo $0 FATAL ERROR: Blank blockcount >&2

  exit

fi



command="/bin/dd if=$device bs=$blocksize count=$blockcount conv=notrunc,noerror"

echo "$command" >&2

$command



# ends.