The system is a Northwood 2.8 (800MHz) on a Gigabyte GA-8I875Ultra , 1GB DDR400 (Viking @ 3-3-3-6) , 80GB SATA Seagate 7200.7. BenQ 1640 is on primary IDE Channel connected with a 80pin (ATA 133) cable and Liteon ltr-52327S is on Secondary IDE Channel also via and 80pin cable.
The unit is made in Malasya( at least I think so ,I don't want to open the case right now) in May '05. Came shipped with BSHB and I burned all of my discs except one with that version.I switched to BSIB-1 knowing it's a bad firmware but I wanted to try it out anyway.
The first DL disc was Traxdata (Rotek D01) @ 2.4x and the second one was a Verbatim (MKM001) @4x. Both of them could be read from the BenQ unit but PS2 and some other drives refused.
The third DL disc was also an MKM001 but this time @2.4 with BSIB.This disc is readable in both BenQ and PS2 but PS2 can't read the Layer Break part( nor can BenQ).I don't have the scan of that disc but the scan was perfect (PI <15 ,PIF-4-6) until Layer break and then there is a single spike (PIF-2500 and POF - cca 23000).
I've attached the scans so you can see.