[WBEL-users] Creating ISO images from CDs

[Alfred von Campe]

> You can use dd to make a copy of your ISO images off of the CD's.
>
> dd if=/dev/cdrom of=image.iso
>
> When you are done, verify the md5sum against the checksums posted on 
> the
> whitebox site to make sure you got a good copy.

I used the dd command to create new ISO images (and I also found the 
ISO images sitting on a co-worker's computer).  But their size was 
slightly larger than the original ISOs, so of course the MD5 sums 
didn't match:

-rw-r--r--  1 alfred  staff  657719296  4 Nov 17:39 
liberation-respin1-binary-i386-1.iso
-rw-r--r--  1 alfred  staff  662110208  4 Nov 17:58 
liberation-respin1-binary-i386-2.iso
-rw-r--r--  1 alfred  staff  498499584  4 Nov 18:11 
liberation-respin1-binary-i386-3.iso
-rw-r--r--  1 alfred  staff  658026496  4 Nov 14:31 wbel3-1.iso
-rw-r--r--  1 alfred  staff  662417408  4 Nov 14:33 wbel3-2.iso
-rw-r--r--  1 alfred  staff  498806784  4 Nov 14:35 wbel3-3.iso

However, I copied all these ISO images to my Mac, mounted the images, 
and then did a "diff -r", and there was no difference found on any of 
the three disks.  Can anyone explain how this is possible?

Alfred