Digital BW, The Print

I am wondering if people have experience archiving image files on DVD 
as opposed to CD.  Is the DVD less reliable data storage?  After 
transferring many CDs to DVDs, PS is suddenly unable to read the DVDs 
and I get a "Cyclic redundancy check" error.  And yes, I've still got 
all the CDs.

Experience would be much appreciated.

Thanks,
Walt