Scirious Posted March 14, 2006 Report Share Posted March 14, 2006 Isa there any way I can know which of my burns aren't ok? Something like RedHat's media check that checks CDs before install? Thanks, Scirious. Quote Link to comment Share on other sites More sharing options...
tyme Posted March 14, 2006 Report Share Posted March 14, 2006 you can do an md5sum check on your isos, as described here. if you're in linux you can mount the drive and do a md5sum on the actual media too. also, most burning applications have an option to "verify written data". Quote Link to comment Share on other sites More sharing options...
Scirious Posted March 14, 2006 Author Report Share Posted March 14, 2006 My ISO images are ok. I've already checked them. But some of my CDs arent't and I don't know which. I'm going to reburn those that are problematic, but I don't know which they are. So I need to check them and, as they are already burned, I don't know if K3B can help me. Quote Link to comment Share on other sites More sharing options...
polemicz Posted March 15, 2006 Report Share Posted March 15, 2006 As a rule don't burn at over 4x, over 4x you will probably get bad burns. Quote Link to comment Share on other sites More sharing options...
tyme Posted March 15, 2006 Report Share Posted March 15, 2006 As a rule don't burn at over 4x, over 4x you will probably get bad burns. I wouldn't say "probably", but there's more of a chance ;). I burn 25x on a regular basis without any issues. Quote Link to comment Share on other sites More sharing options...
Steve Scrimpshire Posted March 15, 2006 Report Share Posted March 15, 2006 (edited) I found this script here http://www.troubleshooters.com/linux/coasterless.htm#rawread for Linux #!/bin/sh device=$1 blocksize=`isoinfo -d -i $device | grep "^Logical block size is:" | cut -d " " -f 5` if test "$blocksize" = ""; then echo catdevice FATAL ERROR: Blank blocksize >&2 exit fi blockcount=`isoinfo -d -i $device | grep "^Volume size is:" | cut -d " " -f 4` if test "$blockcount" = ""; then echo catdevice FATAL ERROR: Blank blockcount >&2 exit fi command="dd if=$device bs=$blocksize count=$blockcount conv=notrunc,noerror" echo "$command" >&2 $command ./rawread /dev/cdrom | md5sum without mounting it, but with the CD in the drive. Assuming, of course, that /dev/cdrom is your CD ROM drive. This md5sum should match the ISO. I disagree with the 4x burn speed, but we could debate that all day. :D I have burned all my data CDs at max speed and created not one coaster. Now, music CDs, I won't burn at higher than 4x, due to loss of quality. Edited March 15, 2006 by Steve Scrimpshire Quote Link to comment Share on other sites More sharing options...
ianw1974 Posted March 15, 2006 Report Share Posted March 15, 2006 I used to buy cheap disks be it CD or DVD. Expect coasters with cheap media. I now by TDK, never had a coaster since. And I burn at the default speed that K3B picks up which is normally the max of my drive 24x or higher for CD and 8x for DVD. Quote Link to comment Share on other sites More sharing options...
Scirious Posted March 15, 2006 Author Report Share Posted March 15, 2006 People, usually I burn them at 52x with no problems. This is the first time I had a problem like this. I going to try this script and see if ti helps me. Thanks. Quote Link to comment Share on other sites More sharing options...
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