I notice that the BTC 1004 and 1008 are now on the list of supported drives, so I scan the discs with BTC 1004IM (0051, RPC1) and LiteOn 411s(FS0J) and CD-DVD speed V3.12
first is the DVD+RW disc, burn as Data. Only the BTC has the summary because LiteOn has issues(see last picture), appearently what I thought was a bug in KProbe with DVD+RW is actually LiteOn drive's fault. Notice it detected ~4.4GB when BTC shows ~4.2GB. LiteOn was scan twice due to the error, I though the first scan had issues, but both time turns out have the same error. Result is slightly different though.
The only thing that is consistant base on the 3 scan is that at about middle of disc (~2.5GB area), the PI is always higher than the rest... consistant through out other disc in the batch as well.