DVR-111D CD-R Read Speed Variation?

I am still very new at reading these graphs. I notice some speed variation on the transfer test results when reading a verbatim cd-r that was written by the 111D. The same disk when read on my old cd drive does not show this much variation. And even the very troublesome LiteOn DVD-RW drive I have reads the cd-r without as much variation.

I am wondering if this is normal or do I have a problem with the 111D on CD-R read?

This is the 111D read…


This is the same cd-r read on an old Yamaha CD-RW drive. Notice there is much less speed variation during the read…


I have had a LOT of trouble with this LiteOn DVD-RW drive so I’m reluctant to use it as any kind of reference; however, it read the same cd-r like the Yamaha drive with less speed variation…


For reference here is what the original write to the cd-r looked like…


Normal or Problem ? TIA.