A k3b (actually readcd) problem

[Gencho]

Hello,

I have noticed that in Knoppix 3.6 k3b uses readcd to generate disc images while in 3.4 it used cdrdao which worked well. But readcd appears not to work on my computer, even called outside K3b (I guess the change in k3b is not from Knoppix but from KDE - is it so?).
Worse than that, after trying to read some CD, the CD-ROM (0,1,0) turns for long time and the system becomes very slow. If I stop the program (actually by ejecting the CD) nothing else works and there are Bus (or memory?) error messages, actually, I can't shutdown the system properly and need to run fsck.

ATAPI:0,0,0 : LG , CD-ROM CRD-8322B, 1.02
ATAPI:0,1,0 : HL-DT-ST, CD-RW GCE-8400B , 1.02

Running Knoppix from CD from the first drive. I never had similar problems with cdrdao.
Any ideas?

Bye,
Gencho

[Gencho]

Well, I have found out that cdrdao isn't always good at writing, sometimes cdrecord works where cdrdao doesn't. But that is offtopic here.

With readcd I have noticed this difference:

knoppix$ readcd -scanbus
scsibus0:
0,0,0 0) ' LG ' 'CD-ROM CRD-8322B' '1.02' Removable CD-ROM
0,1,0 1) *
0,2,0 2) *
0,3,0 3) *
...

while

knoppix$ cdrecord -scanbus
[...]
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.8'.
scsibus0:
0,0,0 0) ' LG ' 'CD-ROM CRD-8322B' '1.02' Removable CD-ROM
0,1,0 1) 'HL-DT-ST' 'CD-RW GCE-8400B ' '1.02' Removable CD-ROM
0,2,0 2) *
0,3,0 3) *
...

I haven't tryed yet if I have the same problems with dhe first drive (which appears in the first list, unlike the second drive).