Arthur Marsh wrote, on 2009-03-16 21:16:
Hi, I just posted this to the Debian bug-tracker (which hasn't responded
with a bug number yet).
If anyone can offer some suggestions to try to see why CD verify fails
even when the CD is written correctly, I'd be happy to burn a few CD-RW
disks and observe the results.
Package: k3b
Version: 1.0.5-3+b1
Severity: normal
Hi, I recently acquired an LG DVD writer identified in dmesg as:
hdb: HL-DT-STDVD-RAM GH22NP20, ATAPI CD/DVD-ROM drive
ide-cd: hdb: ATAPI 48X DVD-ROM DVD-R/RAM CD-R/RW drive, 2048kB Cache
When I burned a DVD (which used growisofs), verify succeeded, but
when I burned a CD (which used wodin), verify failed.
I then found a shell script to re-check the md5sum of the burned media
against the md5sum of the .iso file:
#!/bin/bash
#shell script to verify a burned iso
ISOFILE=$1
echo "Isofile: " $ISOFILE
DVDDRIVE=/dev/hdb
BYTES=2048
#Get the number of extends
NROFEXTENDS=$(($(ls -l $ISOFILE | awk '{ print $5 }') / $BYTES ))
echo "Nr of extends: " $NROFEXTENDS
#Get MD5 sum of DVD
dd if=$DVDDRIVE bs=$BYTES count=$NROFEXTENDS | md5sum
#Get MD5 sum of iso file
md5sum $ISOFILE
and this showed that the CD burned with k3b, which called wodin, had in
fact been written correctly.
If someone needs me to do further tests I will purchase some cd-rw disks
and be happy to try again.
and of course, the cd-rw (restricted to 4 X burn speed) verified fine.
Arthur.
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