How to check if cd copying went right.

dr_zayus69 · 03-29-2005, 02:53 PM

hi. I am making a backup copy of one of my cds in k3b. i wanted the tracks to be set up the same way (they blend into each other) so i tried using dd at first. Then i remembered music cds don't mount so i couldn't use dd on an umounted cd. i assume trying to use diff wouldn't help either for the same reason. So how can i check to see if the copying went alright in lew of listening to the whole cd over? Like some way i could see the tracks so that i could see they all got there and in the right order?

uberNUT69 · 03-29-2005, 04:22 PM

Using k3b, create an image of the cd your are going to burn (ie. an iso)
When you load up that image ready for burning, k3b will calulcate it's md5sum for you.
After burning has completed, the md5sums should be the same, and you can delete the iso image.

rnturn · 03-29-2005, 06:33 PM

You can use "dd" on an unmounted CD. A command such as:

Code:

dd if=/dev/cdrom of=/tmp/cd+AF8-image.dat

should work.

I've done this to make car copies of CDs that have tracks that seque into one another and it worked like a charm. To test it, I didn't listen to the entire CD. Just fired up a CD player that will let you fast forward/backward. To see if the seque between tracks two and three (for example) is okay, skip to the beginning of track three and use the "fast reverse" button to go backwards into the latter part of track two. Then just listen to the transition netween the two tracks. Also, your CD player will probably jump out onto the internet to look up the track information on CDDB or the other equivalent services. You'll be able to see the tracks in the player's menu.

rnturn · 03-30-2005, 10:28 PM

Quote:

You can use "dd" on an unmounted CD.

Yikes... I'm not quite sure what caused that brain fart. You can't use dd on audio CDs. (Note to self: No more posting without referring to Ye Olde Notebook.)

I went through my old (it has been some time since I've actually copied entire audio CDs) notes and found that when I did this, I was using cdda2wav and cdrecord for those problem CDs where there's no silence between tracks. Most of what was in my notes was directly from the manpages for cdda2wav and cdrecord. In particular, look at cdrecord's page and skip down to the examples (enter "/+AF4-EXAMPLES" while displaying the page). Then search for "infofile" and you'll see the example showing the commands

Code:

cdda2wav dev=1,0 -vall cddb=0 -info-only

cdda2wav dev=1,0 -no-infofile -B -Oraw - +AHw- +AFw-
cdrecord dev=2,0 -v -dao -audio -useinfo -text +ACo-.inf

(You need to run "cdrecord -scanbus" to find out what your device really is.) If all you have is the CD-R drive, you can break that second command apart into

Code:

cdda2wav dev=your-device -no-infofile -B -Oraw

which'll dump everything into a series of files named "audio+AF8-01.raw" through "audio+AF8-NN.raw". Pipe these into cdrecord using

Code:

cat audio+AF8AKg-.raw +AHw- cdrecord dev=your-device -v -dao -audio -useinfo -text +ACo-.inf

I haven't figured how to get k3b to do the sort of thing you're trying to do. Heck I can't even get it to recognize my Plextor CD-RW drive and since SuSE and my old friend "xcdroast" don't seem to get along, I've been getting back to the basics with cdda2wav/cdrecord for making any "commute mix" CDs. ("dd" does work nicely for copying data disks for friends.)

Hope this helps (and sorry for the misdirection in my earlier post).