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.
