Incorrect burn of CD

[Pita]

On a HP-2133 Mini-Note I have an external IBM CD/DVD R/RW USB drive and I am
unable to burn correctly with k3b neither VL7-STD-RC1 nor VL7-Lve Beta1.
Md5sum of the iso files are correct, however, when bured to a CD md5sum
returns error.

Yet I am able to burn other iso files correctly using k3b.

Could there be something wrong with the VL7 iso files in this respect?

Further how could I make use of the IBM USB CD drive with my desktop PC instead
of the normal CDrom drive.  If I connect it the light on the drive continuously
blinks, however, drawer cannot be opened. Would it need an extra power supply?

[Pita]

On a HP-2133 Mini-Note I have an external IBM CD/DVD R/RW USB drive and I am
unable to burn correctly with k3b neither VL7-STD-RC1 nor VL7-Live Beta1.
Md5sum of the iso files are correct, however, when burned to a CD md5sum
returns error.

Yet I am able to burn other iso files correctly using k3b.

Could there be something wrong with the VL7 iso files in this respect?

I purchased now a new DVD/CD R/W drive, LightScribe, for my desktop PC
 and again  "md5sum /dev/sr0" returns Input/output error both for VL7-STD
and VL7-LIVE. md5sum of the iso files are correct.

I double-checked my old VL6-Live and  a new Salix-LIVE-Fluxbox both return a correct
md5sum of the burned CDs.

Just wonder what could be wrong with the VL7?

Code:

md5sum /usr/local/VL7.0-STD-RC1.iso
0dd8237cbb247759afb1eb120f20252e  /usr/local/VL7.0-STD-RC1.iso
md5sum -c /usr/local/VL7.0-STD-RC1.iso
md5sum: /usr/local/VL7.0-STD-RC1.iso: no properly formatted MD5 checksum lines found

Could that be the reason?

[roarde]

By chance, are the VL 7 iso's larger than any other iso's that you've burned correctly with this setup of k3b?

[Pita]

By chance, are the VL 7 iso's larger than any other iso's that you've burned correctly with this setup of k3b?

VL7-RC1   732 530 688

Salix-Live  676 884 480